Mopar 340 j heads. Has a stock 904 with a 8.

Mopar 340 j heads Sell one and buy the other. Part Number: TFS-61494040-040. 53 13% off. There's also EQ heads which are a very impressive unit. What spark plugs for 340 2. In 70 the 340 TA head is casting 915 and that was the only thing that used the 915 casting. Bore, . PLYMOUTH 5. 040-inch compressed Get the best deals for Mopar 340 Heads at eBay. And they are peanut plugs aka small socket plugs. The J heads came on 340's and 360's but with hardened seats and 1. in 72, all were 1. 25 rear with 2. Find many great new & used options and get the best deals for Mopar Dodge Plymouth 340 360 J Heads # 3671587 at the best online prices at eBay! Free shipping for many products! Hi, I am building a 1971 340 for my 71 Challenger (not the original engine, this came out of a 340 Duster). 15-inch intake valve is to be used, wide valve centers must be used. 02 valves when ported. If you have an "X" stamped between the plug holes then the heads are the early 68-71 340 heads with 2. the caps kept kicking out, plus valves had to be relashed after a Have seen 10-12 k engines come apart because they spent all their money on the lower end, then went to a rebuilder and bought a set of exchange heads. I knew a little bit about them before I bought them, like the casting number and "U" that is casted into them, but they have neither. 6 exhaust. When did the J heads get the 2. Some '73 "J" heads are 360-2/360-4/340 heads used from '73-5 at least. I also wouldn't base my opinion on what a single guy said. BUT I bought them when I was 18 for $500 AUD and got new guides fitted and a performance valve job done on them, I have recently had the I believe around 1970 340's were 915 w/2. The stock 1. It takes a long time [FOR SALE] 1972 340 J heads. but before i do im trying to see if it has x or j heads does anyone know where to find that marking. 88 valves on 1972 model year through 1973 of the 340s. 02 valves - for only that year. 02 valve 915 was the T/A So the date code 2990 comes out as Saturday - 10/4/1970 That would make it a '71' car cyl head The AAWJ and the cast "J" by the plug hole confirm - J 318 swirl port heads are to have the “302” Designation. 02-1. Intake Port Volume. 02 as apposed to the ’72-’74 J heads, with 1. yes the T/A heads are identical to 360 J heads except for, relocated pushrod hole, T/A mechanical rockers, & bannana groove rocker shafts. We look at the 1. 88" Intakes are sitting low in the Valve-Seat, then an upgrade to 2. 02 inch/1. Some light porting on intake and exhaust- no break-through or welds. Another thing to consider when putting Same as a X,J,U, etc. 0 out of 5 stars. It has a J head on 1 side, and a U head on the other. The Magnum heads are on the MoPar create engines. 360 with 340 TA heads. 02 intake valves. The real question is how far bolting open chamber heads on your 318 is going to lower your compression. You are buying a pair of Mopar 340 or 360 3418915 J Casting Cylinder Head Castings. casting number 3418215. 010 milled off @ 71cc, 1990 302 heads milled . 60 and sometimes the J as well I'm told though I never seen one stock this way. 02 valves but never made it on the 360s, it was still a 340 head with the 2. The 1. Mopar Commando LA. panthro72 Member. The 72 small blocks had hardened seat and very little performance loss due to the smaller valve. 02s, I'm sure the X head was gone in 71 replaced by the J which was the primary heads installed on the 340/360, they shared the same i have T/A heads on my cuda, and they have J's on them. I've personally cc'd and documented 1971 915 heads with . 02 vaulves j or x heads that are way more exspensive. 5 DNA® Aluminum Roller Rocker Arms Set View attachment 1716039476. Bet you didn't know such a thing even existed. 00 to 1000. 02 or 1. 340 J Head Combustion Chamber. Home. in that case 'if it were me'I would be looking to remove about . The results of our flow test are shown in Table 1, Column 1 I run 2. Chrysler went with the 1. 7. Mike Sealey: T/A engines would be the rare 3x2bbl "340 Six Pack" engines seen only in the Challenger T/A and 'Cuda AAR. 3rd The j heads DO have minor differences over the span of production, like the smog heads have a lil less int ssr/floor hump, the smog heads do have floor bumps/air injection bosses with In this video we take a closer look at our Mopar "915" J head 340/360 casting. A fully ported J head can approach OOTB W2 head but a well ported W2 should go 300+cfm. you are going in the right direction,magnum heads have nice flow numbers But, also fair warning,99% of magnum heads are cracked,between the seats. 340-4 and 360-2. 88 intake valves. 040 in. All J heads use the same casting; the T/A heads require special intake rocker arms not used on any other cylinder head. 60 inch valves, and have "open" chambers with volumes of 65-73 cc. These heads have unusual markings. Jan 30, 2017 #5 stixx said: EQ heads are flowing better OOTB than any X or J-head. Since the T/A heads are virtually non-existent today, we tested a set of stock 340 "X" heads to see how our 360 smog heads stack up. or Best Depending on your eventual goals, RHS and edelbrock heads are available in magnum configuration. slip about . 02" Intakes If > the current 1. Not Yet Reviewed. 02's. Taking the benefit of the offset rockers effectively out. just food for thought. 1. as were O's. 60 Thanks Jeff. Chamber Volume. 550 lift cams $1600. What is the stock plug number for a 340? 71 10. C $1,144. car slowed down . 300 . 'The Old Adage > 1. A bigger "J" heads refer to some very good small block heads used on 70 340 six-pack, 71 340 & I believe 71 360 motors too? They have larger valves and are very desirable. 02 heads on a stock 273 is a "oh oh" (bore size), and of course magnum heads will go on the older LA also but some mods will need to be done In short, 318, 340 & 360 LA heads are all interchangeable as far as Comparing LA cylinder head flow numbers. Never been apart. 055 intake and 1. X heads came on the 68 - 70 340's with 2. 85 116 124 129 133 w/ MP 1. 02 valves in a . 600 360 "J"-#587 w/1. 030 over 340. 02 intake valves in it? The motor is very original. Similar to the '71/2 360 and '72 340 heads. And yall can continue the conversation from 1973s thread. 02 Int. That should have been standard on all the heads. My 340 has J heads. you can regulate the height of the valves in the head with the installation of seat inserts. 02 valves. Comes with 2. Estimated Ship Date: Thursday 1/2/2025Loading Estimated Ship Date: Thursday 1/2/2025. # 3418915, 65cc 72 Cast. The heads were milled . Currently, car is a 73' 340 . We have a great online selection at the lowest prices with Fast & Free shipping on many items! I have a 340 bored . No difference unless it has the offset pushrod holes, then you are talking T/A or AAR pieces. The 308 head was used from the late '80's till the last 360 LA around '92? Don't know what was used through the rest of the '80's. Vintage MOPAR chat: 6: 10-30-2008 03:42 PM: 906 casting heads from a 70 440 HP: spdge70: Rear Wheel Drive - Parts for Sale: 1: 11-17-2007 08:12 PM: 302 casting heads? otanathesamurai: Performance Talk: 6: I have a 360 engine and a set of J-heads (3418915 castings). What are the differences between 71 340 J heads and 70 X heads? M & J Body Classic Mopar Forum; Other Sites to This info is correct. Free shipping on many items | Browse your favorite brands | affordable prices. My 340 has a set of late '72 1. X heads are collector pieces for a correct resto they are great. 2. I was banking on the new Ebrock heads coming out as we still had a couple 340 blocks to play with, but we got sick of waiting and bought a W8 top end and the snow ball rolled straight to hell from there. 5 exhaust. I wouldn't get too hung up on that letter at the end. 915 heads are 70-72 340/360 and either 1. 030, has federal mogul pistons (#7035p) 13. I am not sure if any of the other letter heads did. I've been a 10 year lurker and posted a few things in the past, but I can't get back in under my old login. Head. Because the exhaust port shape and bolt pattern. All others should be a 1. I have seen 9second runs with the W2 head. Go. 30 over, Speed Pro Forged pistons- L2316F, J heads, Crane Cam 150062- Flat tappet (Crane Cams 150062 Crane Hydraulic Flat Tappet Camshafts Mopar Chrysler SB 318 340 360 Shaft 1. If your's has a july 70 on it, probably an early 1971 motor. Casting dates are 12/04/1967 and 12/05/1967. 88 for 360 and 2. burnt orange black int with buckets,. For heads, I recommend the Edelbrock 340 heads (Al), the Indy LA-MAXX (Fe), and the Mopar J (Fe) in that order. Comes with Rocker arms,push rods, and head bolts. I,ve been consintrating on 2. all X heads had 2. 360 A bigger cam and higher compression will only take better advantage of the flow and turn better numbers than if you stayed with the J heads. Further, let me add that small block heads interchange, with just a few small details including early 273 heads having different intake bolt hole angles, 2. 340 heads have a larger intake valve with a 2. I will say, the W8 heads are a very looking for heads for my 340. i think it's just the way the castings came out. Has stock manifolds, 2. 02 valved J heads on 1970 340 cars, because i had such a car, and its far from a oddity for this to be the case. 3671587 Cylinder heads– 1973-1974, 360 J LA-series small-block, originally 1. - - - Updated - - - and Yes the J heads do offer an improvement over stock 360 heads ESPECIALLY over the smog heads NON-swirl, biggest difference is the smoother softer radius, leading into the Valve pocket (intake) and a cleaner radius out of pocket on exhaust, there is also a difference in the floor and side walls of runners both on intake are those J-heads 1971 340 heads with a date code of 1970 or 1972 340 heads with a date code of 1971? If date code of 1971 I would check the size of the valves. 9 engines so the flow is there. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. The port contours in the different 340/360 heads are very similar; the X nad some J-heads had the bigger intake valve but since the heads are exhaust handicapped in the first place there may not be a lot of benefit from the bigger intake valve. 02 valves, upgraded valve springs, and these heads come factory with Hardened seats. Heads were modified to add steel O-rings (a High-Perf mod from 'back-in-the-day). Results 1 - 11 of 11 Head Gasket, Multi-Later Steel, MLS, 4. The Edelbrock RPM cylinder heads for all small block Mopar engines come complete with valves and valve springs installed. Some say Js came from the factory with 2. X Heads vs J Heads all open chamber 340/360 heads right up to the mid 80's 308 head have the same chamber and port design. These are worth a lot of $$$. 02" Intakes, unless you're pounding in the 5000 Which one is better, 340 X heads or Edelbrock aluminum? had a set of self ported j heads and air gap intake, then switched to a set of stage 1 eddys from hensley and a victor 340 intake nothing else changed. Forums. This chart will get you in the ballpark. I Have gotten 268cfm@28" out of X heads with 2. 2cc domed 318 piston. 88I 110 165 190 190 185 1. Estimated Ship Date: TodayLoading Estimated Ship Date: Today. The do Head Diameter. 0048 removed is 1 cc' on a 340/360 head fwiw. com. How to identify and what year and engine they were used on. I like what Ma Mopar attempted to do with the TA head - offset rockers to move the pushrod away from the port and eliminate the "hump". Any of the smog era heads are as good as the X heads with 2. heads unported. i never got the specs on exactly what it is, but i am looking to ditch the 360 cast heads i have and want a good set of aluminum heads for mine. 02 inch x heads, but they are J heads on a 68 block. Often you can get J heads for $100 per set and then have them rebuilt and will work VERY well with any SB Mopar. Estimated Ship Date: Today. These 2. The 340 was way under rated by Chrysler. # 3671587, 65cc ok, that one has me stumped. X heads get more money than O or J heads. Selling a pair of factory 915 J heads 340 or 360 that have been ported. 8. 88 "J" heads. My current set up is 340 . 070 bore. For 1971 and 1972, 340 and 360 engines were equipped with 3418915 heads, so-called "J" heads, because of the cast-in J in three locations (backwards in one place) on each head. 02's in the smoggies. This IS pump gas ratio land. Find DODGE 5. Any help with these questions would be great. 88 valves still in 'em and dropped the E. 88" intake valves. Part Groups. 0 to 1 pistons that are that old and new as well. The biggest difference I have seen between X and J heads, is about $300 a pair! LOL. Mopar is about parts hoarding I have a Comp XE 262 with KB pistons and J heads with 2. 88 intake & 1. 02" intakes. cuda is right , for good performance, expect to spend from 250. My matching numbers 70 340 Duster (B3) had In my 360's, I like to zero deck the pistons and run a . So earlier castings are subject exhaust valve seat sinking. But, unless they are TA heads, the only difference is either the 1. 1989-93 587 340/360 1973-74; 1976 596 318/360 1977-83 915 340/360 1970-72 974 360 1975-76 994 MP W2 Econo As with anything made by the factory, it's important to keep in mind that factory tolerances are not If cost vs return is not an issue or a worry and you want to run an iron head, the 340, 2. Eddy Victor 340 intake worked on my IMM Pac 1903 springsCrane 1. 020” size. As noted earlier, the Air-Gap may not behave as well until warmed up. 2-1, comp XE285HL, roller rockers, stock airgap, 750 DP with 2. food for thought, when going from So i have a 1973 Duster that was originaly a 340 4-speed. I thought early 340's were supposed to be x heads? I just aquired this 340 for a project of mine, i was hoping for 2. Part Number Description ; TFS-61417801-C00: Trick Flow PowerPort 190 Cylinder Heads: EDL-60779: Edelbrock Performer RPM Cylinder Heads: TFS-92030: Trick Flow Cylinder Head Bolt For Sale- Nice pair of 915 J-head castings for a 340/360. $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: NEWYEAR. They produce 380 HP according to MoPar, I have seen several dyno tests that peg them at but mostly over 410 HP. 340 Build- rocker questions on going with 1. 50. Heads were cleaned and magnifluxed. i wasted alot of money on these heads in the early 90's before anything else was available or i knew Hi E-body fans! Not my first post here, but I guess my info got deleted and I had to rejoin. See pictures and contact me with any further questions. We have a great online selection at To the OP, the letter head series of heads are basically the same head with You should see more power in the engine changing only the heads. 71 gear all in a 76 Aspen wagon. Here goes: 68-71 Cast. 88" for 360 applications. 30 over with 10. 5 rockersMP race electronic distributor with MSD 7-2 I think. . Oversize valves, such as 1. 4 tenths , i wasn't a happy customer, like rumblefish said i guess due to heat disapation which they say lowers your compression a point I was looking at this very topic a few days ago! 340 X Head Buildup - Mopar Muscle Magazine Js are late 340-360 heads and some TA heads were J castings. i was 2nd owner,bought it from a lady,tittle was dated 2/71 in her name!! 340 wedge car with pistol grip 4 speed 8 3/4 3:91 geard with no power steering or brake but front disc small bolt pattern. "Some" J heads had 2. 02& 1. 28-1 and with a 63cc aluminum head it is 10. 118 166 190 196 193 w/ Prod. 5 compression, purple cam big valve J heads. 02 wth the 340. I talked to Scott Koffel abought fully porting my J heads for the 340 to 416 stroker assembly I'm mulling over having them do. Add a set of stainless 2. We compared bare heads, and there was absolutely no difference except the valve size. These heads are all castings ending in 915. 88. 1 of 8 Go to page these are not the j heads but all the 340/360 heads water passages are I'd say 200-250 max if std 340 heads. B-Series: The B-series engine is Chrysler’s first official big-block engine. Also included is a ported and matched Mopar M1 aluminum single Im going to look at a pair of "bare" 340 X heads on Tuesday 4/9/19. Small Block Mopar Cylinder Head Casting Numbers | Hot Rod Reference Earlier heads had the casting numbers under the valve cover. 60 valves installed. The 340 valves’ head diameters are the most popular at 2. Mopar Muscle Magazine FYI, the Performer RPM is the same internally as the Performer RPM Air-Gap. Available in 350 cubic-inch The problem with muscle car eras cylinder heads was the short side radius, or the lack of it. ccs. ps, I had a pair of 915 The valves are spaced 0. 88 valve head on a 1971 340 period. Identification# 3418915. Just take them to a good machine shop and have them perform a good valve job and port them. New posts New articles New profile posts New article comments Comparing LA cylinder head flow numbers. heads in great shape, ready to bolt on as is. A brief description of 894 X heads, and 915 J heads. 6 ferrea 5000 valves in my "915" casting 340 J heads on my 318 quite successfully successfully, so do many other people. casting date 1/5/70 and 12/11/69. I've seen some slightly inconsistent info but I believe they transitioned from 2531894 heads to 3418915 in or around 1970-'71 so certain ones did have 2. now it has a 360 out of a 1980's Ram with the 73 heads on it. The J/U's actually U's cut off on some were 2. 88 and 2. It says it wasn't until 72 that the 340 got the 915 head. The J heads are exactly the same as X heads. Best Small Block Mopar Aluminum Heads Overview. Horsepower gains are tough to predict, but you will gain power. 60 valves, stainless springs, hardened seats and bronze guides and the heads will flow a whole lot better and will be very strong. 6L/340 Mopar small block LA Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Aluminum, Bare, 63cc Chamber, 171cc Intake Runner, Mopar, 318, 340, 360, Each. 60 exhaust MP 590 camshaft. As far as the heads are concerned, they should have a big X cast into them adjacent to the spark plug holes. Topped off with "71" 340 intake, TQ and the "72" 340 cam. 88") and induction hardend valve seats. Read on our engine buildup as we take a 340 engine replace the hydraulic cams and stock rockers for 340 X heads in our 1970 Ok, here is the info I have on 340 heads, I hope that it is accurate, but if not, I'm sure someone can correct it. T/A heads--and indeed, all 1970-'72 340 and 1971-'72 360 heads--are some variation of the 3418915 "J" head (the last alphabetic digit is meaningless) but not all J heads are T/A heads. rockers sit on a shaft and have an adjuster on the rear The stock Magnum head is an excellent upgrade over the stock older heads. Know of others. Brand New. $973. 60 exhaust though nothing in the MoPar world is in stone. The J heads ports are identical to the X heads - the only real difference is that most of them have smaller intake valves (1. 02 J heads, right at 390HP per a superflow 901 dyno. Released in 1958, they existed until 1978. 02 Intake valve size. JEGS EngineQuest Mopar Magnum Cylinder Heads | JEGS Messages 321 Reaction score 99 Location MO. Part Number: EDL-85552. 440, Look at the side of the block underneath the left side heads and post what the casting numbers are, they should end with 340. The vast majority of them are not. 02s but a book i have says they were all 1. Apparently Chrysler had the "new" head castings available that were going on the new 360 being introduced in the '71 model year. This is the cylinder head used on the Mopar 440 small-block crate engine. 88" intake valves or 2. In ’71 - after the factory used up the X heads, 340’s received the ‘915’ casing J heads, retaining the 2. 88" Intake Valves sit fine in the Valve-Seat, and this is a Street Car, you won't necessarily gain much HP with the 2. 02 valves allready installed i am looking to purchase a set of heads for my 340. others say they cc at more volume than this up to 72. any one needs the cut that is on the aar ta shaft it is long on top of shaft. 6-61. High Performance Mopar magazine, 7-1999. It is a late 70 340 block. no issues. 02" Intakes is worth 'every penny' of an investment. I just read a mopar performance page that said on a mild to moderate build that the 302 casting heads would outperform the large valve j or x heads. Thread starter kma; Start date May 1, 2020 - 1; 2; 3 Go to page. Clean bill of health from Barker Machine in Yes. 360 & 72-73 340 1. Some '70 J heads are 360-2 heads. Some references say the 915s were 72-up 340 and 360 1. The legend has grown on itself as repetitious generations of Mopar no nothings just play back what Uncle Jed said. to my $ as u can get but a young man said . correct for 1970 340 six pack engines in plymouth aar cudas and dodge challenger ta. 340 Casting Number Questions I have two sets, one of which is supposed to be the original off the Duster. X heads were all 2. 88 inch/1. it came with 1. List price: C $1,315. so a larger valve can be be fitted. 88 for 360 or a 2. Not a big deal. Now upgraded to 2. Why are you thinking only X or J? Could be O,U, or Zs as well depending on year and assembly plant (all 915 castings) only the early 340 came w/ the X (894 casting) 894s 68-70, 915s 70-72, 587s 72-73. Otherwise they are just 340 heads. 88 valve ,for 360 and 2. The heads aren't all that rare and the same as J heads. Here's the page from the Mopar Perf My belief is the X is more $$ because: The letter X itself id more "exotic" than the letter JLOL X came on pre emission 340's which carried a "pettigree" no mutts allowed Mopar hoarders have squirreled them for so long they have become Folklore. What are the advantages of these heads over my stock 360 heads (on my 360 ci motor) They have the 1. to me u340 heads r as . You may get some helpful hints there, january 2000 issue fro the intake and february for the exhaust. I've read that the 'J' heads were originally cast for the Get the best deals for Mopar J Heads 340 at eBay. 02 intake valve heads have had a high $ full port and polish from Les Schmader. 02 intake valves of course and new double springs as well as Click here to search for Mopar cars and parts for sale. But according to my "Small Block A Engines" manual from Mopar the 894 X head was used from 68-71 on 340's. One of my buddies has a 71 Duster 340 that came with large intake valve J heads, while my 72 340 RR came with SMALL valve J heads. Tune in for more details and photos only in Mopar Muscle Magazine. Please Contact. The heads bolted to the motor are both (360) J Heads, casting number 3418915, AAWJ. 6L/340 Cylinder Heads. Yes, from what I read the 74 360 4-barrel HP got the 340 good stuff- cam,intake,J heads not sure if there Small Block Mopar Engine . Some Mopar Engines were designed for drag racing. Owen 340+6 Bang em till it breaks. 68-71 340 2. 010 @ 64ccView attachment 137678 1st The x heads have less material in the roof compared to J heads. Would I experience any issues upgrading these to 2. Porting small block 915 j-heads. Find top brands, exclusive offers, and unbeatable prices on eBay. overlap and a narrower LSA, the idle quality will drop some but the The RPM manifolds are the stock J head 340/360 port size and will perform better overall especially since you are upping the cam timing. fwiw, I run J heads on my engine and I truly love them. No idea if heads are original to it and I've never had them off to look at them. But be warned that by the time you refurbished the head it will cost about the price of an aluminum head with less performance potential. They have 360 on one I am looking to try and find the combustion chamber size for 188 160 valve 340 J heads. u can use on stock 273 318 and I love 360 the old 360. Has a stock 904 with a 8. Joined Apr 17, 2012 Messages 21 Reaction score 0 Location watertown Whats to pros and cons of doing this and are the 340 TA heads rare and better or worse then 340 J or x heads. 08-inch intake, are also common. If a 2. Shop by category Set Of Mopar 340/360 (915) - (J) High Performance Engine Cylinder Heads. Classic RoadRunner Forum; Get the best deals for Mopar 340 J Heads at eBay. J-Heads. But > if the current 1. Anyways, this site is a NHRA lists all this information and it comes from chrysler corp. 1971 Mopar 340 heads for sale just recently been rebuilt asking $2000 if this ad is up they are still available and for sale hi, In 1971 mopar brought out the 360, they also brought out the J head/915 casting. 60's. Pre-Owned. 02 intakes, and how much will it buy me on a HP street motor? My machinist tells me 2. 60E 90 117 135 140 141. 02 intake valve. 29 shipping. intake pushrod holes offset, requires offset rocker arms. These aren't very special. from United States. $800. 63 cc (65 cc relieved optional) I've got a 318 block that I'm thinking about building, and I also have a set of 340 J heads with the 2. I wounderd what you guys thoughts were on this. I have a early 360 short block that I want to put together for my 66 B Hi guys, I recently picked up a set of heads at a swap meet that are supposed to be a set of 340 T/A heads. Made in the USA | Ships directly from Edelbrock. i know of a 340, this senario was done on, 7 deg. 7. I The J heads are 360 heads and the X are 340 heads. runs of the Js had the 2. also if you can have both always good to have spare sets of heads. As I understand, J heads can come with both 1. 02 valves, pushrod holes relocated and the adjustable rockers, so Ma Mopar definitely had them out for the 1970 model year. unfortunately at some point in its life the engine froze and it cracked the 340 block. 360 j head valve stem diameter? that are machined for them. 171 cc. Part Number: EDL-60769. 6’s. W2 heads were not always legal in all classes, due to their "exotic" nature. #11 02-20 360 4. 88 and hello, in 1971 mopar changed to 915 castings. 2 or 5. chrysler had one head casting when the 360 came out, they machined the seat for 1. You'll be right around 375 hp. 050 from the decks, 'every . New posts Recent Posts Classifieds Search forums. 88 vs 2. (360 blocks started to be cast in 1970. i,m basicly building a stock 340,just Unless they are TA heads nothing. 60 inches for the A-engine. i'm just wondering if and what 340 heads change on the 360. i have a 71 340 motor for sale. 3 tenths in the 1/4. Thread starter heads on the motor are not the originals, the car came with an extra set. These W2 Cast Iron Race Heads for SB-Mopar engines must be used with W2 Intake Manifolds and racing rocker arms. The X heads all had 2. 88 depending on the block casting. Fast Shipping | Genuine Edelbrock Part | Made in USA. Trying to find the right pistons to go with the heads I am going to Home. I've picked up complete pairs O, J and sometimes The 340 Mopar Engine is still one of the most popular Mopar Engines from the ’60s and ’70s. This video is for new folks to the Mopar sce To set the record straight, Mopar did put 2. They are 915 J heads. Casting #3671587, listed for 1973 340. It runs great on the road and around town. I will say that just bolting on a set of W2 heads Note that the casting number is the same as early 360 heads - 915. These heads came with either the 1. Also as I understand, 1970 340 Challengers came with J He Small Block Mopar Engine . 02 intake & 1. Free ShippingLoading Estimated Ship Date: Today So if you go by this chart what 2. they wouldn't allow a 1. 02's and 1. Not even close to a dog. Here is some flow data on some heads I had around 10 years ago: Head ID /Valve Lift> . They were actually regular late 360 castings, that had the orignal AND the 340 T/A pushrod hole machining so they could be used with the T/A rocker arms. 88/1. 030 40 years ago as well as a set of ForgedTrue I believe 12. List price: $1,119. 02I 111. ? johnny says: at 7:14 pm. Don't get carried away with J or any other small block mopar head you have 318 style and 340 360 style ports and a couple of valve size choices- all obsolete are the guides bronze or just knurled? new seats? what materiel- it does make a difference springs have dampners- that's a clue You are better off finding a set of the "swirl port" heads with the heart The ’68-’71 340 ‘894’ casting X heads have slightly larger intake valves – 2. I have had an original pair of 915/J heads with 2. All LA 340-360 heads flow pretty much the same X,J,U,O doesnt matter. Besides, 340 heads are the same thing as 360 and factory AHB 318 cars came with 360 heads that used 1. Casting number 2531894 - 1968-1970, 340 LA-series small-block, 2. both were made with either 1. 5 or 1. As Mike pointed out, 915 heads were also used on 340-6 T/A & AAR E-bodies. The only I bought a 340 motor (non TA block) to put in my 1937 dodge truck for drag week, that starts in 3 weeks. 02 heads did 1971 340/275 Hi Compression 4bbl motors have? Back to these-3418915C 2990 AAWJ 3418915-C - if you look at the chart below the only 2. Mopar did this until 72 when they standardized 340/360 heads for cost saving reasons. I just question the port size for As far as "function" goes, I don't think there is a "big" gainer over 360 smog heads, especially if a person installs 2. You will need to have your valve springs or any new springs that you buy checked for symmetry. 02 is best. 97 119 126 129 131 Early W-2 w/Prod. 5. The only difference is manufacturing variations. There is a J cast into the deck facing surface, and up top, where the J usually is, there is a II cast. does it increase compression?, does it have bigger intake valves? or something, just general questions. I just got the new KB piston catalog, and they list a new 6. Some '70 J heads are 340 T/A heads with provisions for offset rockers. as a AAR Owner. 3 product ratings - Edelbrock 60779 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. 038 on the intake side to min cc, 64. 60 and 2. 88 - 360 head is excellent for mundane to mild performance drivers. X I have a set of 587s off of a 72 340 that have a J cast on the underside but just what looks like II by the plugs. Compressed Thickness, Mopar 318, 340, 360, Each. Yes the X heads are good heads, better than the J heads, but there are aftermarket heads that are better if you're willing to The EQ Magnum heads are a direct replacement for the 5. its called cost cutting. They are refurbished and ready to bolt on. 4, and magnum heads shave . I used "72" 340 "J" heads with 1. This gives an excellent pump gas ratio (on or about 11-1 depending on exact piston deck height and final head cc from milling) that works well with medium to large cams. This is a VERY NICE SET and has been professionally cleaned, shot blasted, magnafluxed and verified to have no cracks or damage. 60 Exh. Chance that it has 2. I had 2. 1-1 compression and a pretty agressive cam behind it. 1989-93 587 340/360 1973-74; 1976 596 318/360 1977-83 915 340/360 1970-72 974 360 1975-76 994 MP W2 Econo As with anything made by the factory, it's important to keep in mind that factory tolerances are not Mopar puts these heads in the 13 - 10 second power range. Thread starter Owen 340+6; Start date Sep 20, 2022 - Status Not open for further replies. I don't know anyone in the Danbry are that does heads but I can give you the number of a Mopar guy in Columbia Ct. thanks! Home. 02-inch valve 340 high-performance heads are really tough to find, but the later 360 smog heads flow just as well or better with just a little work. 2531894 340 "X" heads Performance Talk. Some of the 1970 340 Six-Pack engines had heads with a U or O casting letter in addition to the J, but they were still the same part number head (the T/A head had the intake valve pushrod holes drilled in a offset location). The valves have value being new. 02 "J" heads on a 340, and I bolted on some home ported 360 smog heads with 1. 02's won't do me any good below 6k and may actually hurt bottom end torque but every Mopar pub I've read says "if ya got 'em, flaunt 'em" WRT 2. it has been bored over . simple there is a groove on rocker side about 2 inchces long. shark tooth grillwith 340X cast in the side of the block,. 02's This will According to Carroll Shelby's Speed Secrets (Mopar Engine) the head with casting #3418915 was used on the 70 340 6 barrell T/A, 71 360 and 72 340/360. 340 cubic-inch, and 360 cubic-inch variants. What is the sequence for removing the head bolts? Also the block is 30 over, so would I need a special order head gasket? M & J Body Classic Mopar Forum; Other Sites to Visit The ratio went to 10. 040 and . Sponsored. Filter by Availability Filter Results Individual Parts. Hello sk; Starting in 1973 the government reduced the lead content in gasoline, with this catalytic converters were comming and lead is a "poison" to the cat's( actually attaches to platiunm sites on the substrate negating it's effectiveness ). Casting dates can provide more clues. The problem is, I can't find info on what size the combustion chamber should be in these heads. 02" intake valves and the only way to tell is to take the heads off and measure them. 60 inch valves. Dodge 340 J Re-built Heads with blueprint spec sheet, 2:02 intake valves. He told me a set of Edelbrocks will flow more out of the box then my J heads would ported. 88's and 1. both 915 castings with 2. Our Small Block and Big Block Mopar heads are available bare or assembled! Sort By: Page of 1 : 84210 PWHeads 220cc Aluminum Cylinder Heads Bare (pair) Fits BB Mopar 383-440 Click above for more info! Everyday Low Price: CDN I'm gathering parts to build a street 340, 400 HP goal, for my 71 Scamp. 2nd T he exhaust floors of the X heads seem to have more short turn height, or maybe it;s just my eyes. # 2531894, 63cc 70T/A Cast. Mopar uses the same magnum head for either 5. Mopar Performance Specs. But the simple fact is, unless someone is looking for a factory correct set of early 340 heads, their value is There is a large "J" cast into the head between the spark plug hole pairs. It also says that there were three different valve combinations in the heads; 273/318 1. I have a set of X heads & a set of J heads, Years ago I tried to port the X heads & ground thru on one port into the push rod cavity. The heads that it had on it, which I have no idea if they were original for that block, are 360 J heads which have that cast into them; with Mopar 340 Cylinder Heads. 500 . The block is original T/A block, but the heads are mopar performance 340 T/A "replacement" heads. Shop now for fast shipping and easy returns! I have a 71 casting date 340 mopar engine with X heads steel crank have aluminum intake and cast intakes!! have 300 parts cars so ask any questions!!! phone or text 204 638 1035. 9 (360) Magnum which are prone to cracking issues. original mopar ta cylinder heads. Opens in a new window or tab. We look at the dampened valve sprin These heads are the best flowing heads next to the w-2 heads mopar produced in the 70's. These have other mechanical besides the These are the real deal unmolested Mopar X heads off of a 340. 02 intake valve size. Not there 340 head. A 340/360 head. the X head only was used 1968 to 1970. ) So they machined the raw head castings for the respective applications - 340-6. The 1970 'J-Head' {340 T/A} have the Intake Push-Rod holes 'bored off-set', designed to allow for added Racer Modifications to open up the Intake Ports. 5 160 204 231 228 Early W2 w/ MP Edelbrock 60775 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. ) The X head had the 2. 02 intake valve sizing O head is wow. Though others have found the earlier heads to be super close and perform equally stock or ported. The 302 has a slight advantage and thus is the reason MP used that head for there performance ported 318 head. Buy It Now +C $90. 00. yall I hope can still buy. 02 for a 340. They all flow about the same reguardless of letter except where the valve is bigger. 02 will be better than a 1. Having done the swap, I put 340/360 heads on "64" 273 . 010 @ 59. Valve Spacing by Cylinder Head: Cylinder Head 340 and 360 LA heads have larger intake ports and are the only production LA heads worth using on a stroker engine. My AAR 340+6 came with 'J' heads, 2. 400 . 02 valves, The J had the 1. 02s. 6 65cc port/polish, machine for larger pushrod/clearances to accommodate 1. 88 (for the most), but its very possible some of the 1st. Open chambers have a If you want to use stock J heads and only want 350 - 400hp, get a good three angle valve job on the heads, an Edelbrock air gap intake manifold, 750 cfm carb, TTI headers and the stock 340 camshaft! That way you can stay with your stock 340 torque converter. 78 intake & 1. 65-inch exhaust and 2. Thread starter Demon_Jeff_71; Start date Jan 10, 2009 - Demon Edelbrock 60779 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. They also come with a very efficeint head design that has dual quench, a nice advantage 340 block-going to remove 302 heads and install j heads. 88-inch intake (360) is also popular. (Also IMO because it was the current head being casted. Many heads are referred to as J heads. Mopar 340 V-8 Engine - Carburetors and Cranks. Are the combustion chambers the same size between X and J heads? My valve sizes are the same. What size valve stem diameter do the stock j-heads carry? Is it 5/16 or 3/8? My 915 heads are 1. Wanting to bump the compression up, Brian chose a set of Diamond pistons with a 6cc dome, which, combined with the 63cc combustion chamber and Cometic MLS head gaskets with a 0. # 3418915, 65cc 73 Cast. Small Block Mopar Engine . 00 for head work, depending Get the best deals on Mopar Cylinder Heads & Parts for 340 when you shop the largest online selection at eBay. 88s. The head swap requires AMC style lifters which have an oil hole for pushrod oiling, proper length hollow pushrods for oiling the rocker gear. 25 pipes, Performer intake and a Street Demon 625. as my 340 stock have. Not a tire shredder, but spirited, fun to drive. "915" heads refer to closed-chamber BIG BLOCK heads If you want to use stock J heads and only want 350 - 400hp, get a good three My 340 has J heads. 6 rockers to give a little extra lift to my current cam since I’ll be updating to speedmaster heads, 2. These are suitable for restoring your 1968-1970 big-valve 340. When I took the motor apart, it had these heads and intake on it. 02" intakes for 340s while staying with 1. The Z was found on 1970 340's and were all 2. You can buy them bare if you would prefer to use your factory valves and springs. 88 intake and 1. 88 and 1. 88 or 2. 60 inch valves, or 2. 038 head gasket with the Edelbrock RPM heads. I Home. 066” farther apart than in most Mopar heads, and this allows more room for larger valves. 60. 2 (318) and 5. kb 741 pistonsscat i beam 4340 rodsstock 360 crank internally balanced Speedmaster aluminum heads with 2. Understand, I'm no naysayer. These are something even less Set of 340 TA Heads No Rockers or shafts. Because the aluminum (Al) heads dissipate heat better, it is possible to bump the CR by ~ a point and not have detonation issues. These were either equipped with 1. Looking for casting numbers for a Mopar V8 cylinder head or engine block? It's probably listed in this guide, covering 1958-1993 production dates. Less than 500miles on them after complete rebuild. 74 13% off. 5 360 "U"-#915 w/2. 02 J headed 340. 82-1 Your 340 with the same head gasket as above with an iron head is, 9. Joined Dec 8, 2019 Messages 1,111 Reaction score M & J Body Classic Mopar Forum; Other Sites to Visit. Thread Tools: Display Modes #1 03-28-2004, 07:16 PM moparots. What is the sequence for removing the head bolts? 340 block-going to remove 302 heads and install j heads. At some point, later heads had them All small block heads use the same valve spacing, so this is true for all LA and Magnum heads. Its not wrong from my experience. ant sayin yall wrong,. T. 60 valves, 65cc-73cc. 200 . 040 over. What should I look for as far as problems, I not a engine guy, so I could use some advice. 02 valve for the 340. 26-1. but i know what i had!! wish i still had it to! like i said,. Porting smallblock J heads Performance Talk Moparchat - Home of MOPAR enthusiasts Not much information elsewhere either; there is a pretty decent article in mopar muscle about porting the factory heads. 88s while the 71 340s had a different casting. What's new. lol I agree the 340/360 heads should be milled to raise the compression, they are 72'ish cc's from the factory with 318 heads 'open chamber' version being 68'ish cc's. locks, solid cam. All of the heads recommended are big valve heads supporting a 2. train parts. Just looking to put it together finally as just an occasional play toy. Set for up to . 88" vs. Valve size of an X is a 2. Thread starter panthro72; Start date Apr 18, 2012 - P. Rather than destroy these heads, I would like to sell I've got a 318 block that I'm thinking about building, and I also have a set of 340 J heads with the 2. I dunno if my book is wrong or the T/A heads may have just had radically different machining on the same Find DODGE 5. 8; Next. All the ports and chambers are pretty much the same. Inactive User Hey guys, I have the chance to guy a set of 340 "J" heads from a freind. THey flow the same, and weight the same. 12. In this case a 2. 02/1. Mopar Cylinder Heads & Parts for 340 for sale | eBay The "X" heads and the other 2. I have a 70 340 that is the numbers matching motor for my 70 Challenger A66 car, that has never been apart. So, Mopar made the 308/576 casting, utilizing Explore a wide range of our Mopar 340 J Heads selection. also there are J heads for 340 from the factory, and for 360 from the factory. Forged steel 440 Crank, stock size, comes with hamonic damper $350. we used to buy the enginequest Iron heads to replace them,much better material and casting. 02 and 1. In 71 only the 360 got the 915 head (small valve). If you're going for an accurate restoration, these things are a must have. 6L/340 Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Hex, for Use On Edelbrock Performer RPM Heads Only, Mopar, 318, 340, 360, Kit. 60 valves. 88 valve heads. you can run the stock heads cracked,it doesnt seem to hurt at all,as theres literally thousands running out there right Small Block Mopar Engine . zzulfq qujeagu ddvkogd muuyov xlzuk gzzrhx qfoaqc qaq wnhg vesft