Mopar 340 j heads. # 3671587, 65cc ok, that one has me stumped.
Mopar 340 j heads Here goes: 68-71 Cast. (360 blocks started to These heads are the best flowing heads next to the w-2 heads mopar produced in the 70's. I have a early 360 short block that I want to put together for my 66 B-Cuda. I've personally cc'd and documented 1971 915 heads with . Im going to look at a pair of "bare" 340 X heads on Tuesday 4/9/19. C $1,144. And yall can continue the conversation from 1973s thread. Forged steel 440 Crank, stock size, comes with hamonic damper $350. There is no need to put larger valves in a set of big valve J-heads. 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. Home. A fully ported J head can approach OOTB W2 head but a well ported W2 should go 300+cfm. from United States. 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. Block stamp date code is correct for 1970 (numbers start with FW340. It is a late 70 340 block. 02 intake valves of course and new double springs as well as 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. 02 valve for the 340. 88 valve ,for 360 and 2. To set the record straight, Mopar did put 2. Comes with 2. Forums. # 2531894, 63cc 70T/A Cast. J-Heads. i wasted alot of money on these heads in the early 90's before anything else was available or i knew Dodge 340 J Re-built Heads with blueprint spec sheet, 2:02 intake valves. It has a J head on 1 side, and a U head on the other. 88 for 360 or a 2. Shop with confidence. 010 milled off @ 71cc, 1990 302 heads milled . 88 and 2. 360 . The do For Sale- Nice pair of 915 J-head castings for a 340/360. both 915 castings with 2. 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 i have T/A heads on my cuda, and they have J's on them. Anyways, this site is a great bunch In my 360's, I like to zero deck the pistons and run a . 02 j heads I have tested flow 228cfm intake and 142-147cfm exh. If your's has a july 70 on it, probably an early 1971 motor. Mopar 340 Cylinder Heads. Ultra original other than a 4 or 5 year old “ outside” paint on it. Horsepower gains are tough to predict, but you will gain power. . Thread Tools: Display Modes #1 03-28-2004, 07:16 PM moparots. 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. I dunno if my book is wrong or the T/A heads may have just had radically different machining on the same Note that the casting number is the same as early 360 heads - 915. Made in the USA | Ships directly from Edelbrock. 010 @ 64ccView attachment 137678 Tune in for more details and photos only in Mopar Muscle Magazine. 29 shipping. B-Series: The B-series engine is Chrysler’s first official big-block engine. Its not wrong from my experience. 4, and magnum heads shave . Opens in a new window or tab. Just take them to a I just picked up a 1970 340 Dart Swinger with a 340 engine. These heads are the best flowing heads next to the w-2 heads mopar produced in the 70's. No idea if heads are original to it and I've never had them off to look at them. Brand New. 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. The biggest difference I have seen between X and J heads, is about $300 a pair! LOL. the X head only was used 1968 to 1970. # 3671587, 65cc ok, that one has me stumped. 02 j heads also have an exact 72 cc chamber. both were made with either 1. just food for thought. 60 and 2. Chrysler went with the 1. 010 @ 59. 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 Kit: This is a shot of the Car Craft 340 Swinger that back in 2014 Jim Shepard of Edwardsville, Illinois purchased and restored. These heads are NOt high performance heads but just sime dead stock heads. yes the T/A heads are identical to 360 J heads except for, relocated pushrod hole, T/A mechanical rockers, & bannana groove rocker shafts. I don't know what flow numbers that these heads flow, but they Find great deals on eBay for Mopar 340 J Heads. Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Departments; Brands; Savings Central 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. 02 for a 340. These 2. 88/1. 88 (for the most), but its very possible some of the 1st. I bought it minus the heads. New posts Recent Posts Classifieds Search forums. 02/1. also there are J heads for 340 from the factory, and for 360 from the factory. They have a flow rate "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. 2nd T he exhaust floors of the X heads seem to have more short turn height, or maybe it;s just my eyes. Thread starter heads on the motor are not the originals, the car came with an extra set. 02 valves, The J had the 1. The factory 2. What are the differences between 71 340 J heads and 70 X heads? M & J Body Classic Mopar Forum; Other Sites to I wouldn't get too hung up on that letter at the end. Also as I understand, 1970 340 Challengers came with J He The valves are spaced 0. Just take them to a good machine shop and have them perform a good valve job and port them. They have 360 on one 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. ARP 144-4001 Pro Head Stud Kit Hex Mopar Chrysler Small Block LA 273 318 340 360 The X head had the 2. 88 int valve due to the back side of Hi, I am building a 1971 340 for my 71 Challenger (not the original engine, this came out of a 340 Duster). 88 valves on 1972 model year through 1973 of the 340s. 02 intake valves of course. # 3418915, 65cc 72 Cast. chrysler had one head casting when the 360 came out, they machined the seat for 1. 340 heads have a larger intake valve with a 2. Released in 1958, they existed until 1978. 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 NHRA lists all this information and it comes from chrysler corp. 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. 02 Intake valve size. 340 cubic-inch, and 360 cubic-inch variants. its called cost cutting. I don't know what flow numbers that these heads flow, but they Selling a pair of factory 915 J heads 340 or 360 that have not been cut or decked. What should I look for as far as problems, I not a engine guy, so I could use some advice. List price: C $1,315. Set for up to . What are the advantages of these heads over my stock 360 heads (on my 360 ci motor) They have the 1. Also as I understand, 1970 340 Challengers came with J Heads. The ’68-’71 340 ‘894’ casting X heads have slightly larger intake valves – 2. 02 intake valves. "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 angle valve job on the heads, an Edelbrock air gap intake manifold, 750 cfm carb, TTI headers Selling a pair of factory 915 J heads 340 or 360 that have not been cut or decked. # 3418915, 65cc 73 Cast. Also included is a ported and matched Mopar M1 aluminum single plane intake manifold. The heads bolted to the motor are both (360) J Heads, casting number 3418915, AAWJ. 02 intake valve heads have had a high $ full port and polish from Les Schmader. 02 valve with the Z Find DODGE 5. ps, I had a pair of 915 heads ,2. 038 head gasket with the Edelbrock RPM heads. It still runs Edelbrock 60775 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. 340 J Head Combustion Chamber. runs of the Js had the 2. Inactive User Hey guys, I have the chance to guy a set of 340 "J" heads from a freind. 550 lift cams $1600. My Challenger The other letter heads "O", "U" , & "J" are standard pushrod holes heads . 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. Not a big deal. The heads were just reconditioned with a Comp valve job, teflon seals and have double valve springs. Selling a pair of factory 915 J heads 340 or 360 that have been ported. I will say that just bolting on a set of W2 heads Hi E-body fans! Not my first post here, but I guess my info got deleted and I had to rejoin. All LA 340-360 heads flow pretty much the same X,J,U,O doesnt matter. 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 My 340 has J heads. 1971 Mopar 340 heads for sale just recently been rebuilt asking $2000 if this ad is up they are still available and for sale Click here to search for Mopar cars and parts for sale. I am looking to try and find the combustion chamber size for 188 160 valve 340 J heads. Guy kept them. 88 valve head on a 1971 340 period. Also passenger side of block has (7 - 70) hello, in 1971 mopar changed to 915 castings. 88 valve heads. 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. 6-61. Thread starter Demon_Jeff_71; Start date Jan 10, 2009 - Demon The factory 2. Know of others. you can modify 360's for 340 but it takes alot of porting and My 340 has J heads. Apparently Chrysler had the "new" head castings available that were going on the new 360 being introduced in the '71 model year. 02 as apposed to the ’72-’74 J heads, with 1. 60 inch valves. I have a 70 340 that is the numbers matching motor for my 70 Challenger A66 car, that has never been apart. 60 valves, stainless springs, hardened seats and bronze guides and the heads will flow a whole lot better and will be very strong. Trying to find the right pistons to go with the heads I am going to Home. 02 valves allready installed The problem with muscle car eras cylinder heads was the short side radius, or the lack of it. My matching numbers 70 340 Duster (B3) had 54000 miles on it when i got it. Please Contact. In ’71 - after the factory used up the X heads, 340’s received the ‘915’ casing J heads, retaining the 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! - - - 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 and exhaust that allow 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). 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. they wouldn't allow a 1. 020” size. As I understand, J heads can come with both 1. i think it's just the way the castings came out. 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 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 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. Add a set of stainless 2. Available in 350 cubic-inch When did the J heads get the 2. 066” farther apart than in most Mopar heads, and this allows more room for larger valves. 6L/340 Mopar small block LA Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1000 - Use Promo Code: CYBER. 12. differnt intake valves ans valve springs. I can get a set 1st The x heads have less material in the roof compared to J heads. Not there 340 head. Sponsored. This chart will get you in the ballpark. in 72, all were 1. 74 13% off. Buy It Now +C $90. Small Block Mopar Engine . 02 valves but never made it on the 360s, it was still a 340 head with the 2. The port volume increases from 160 to 165 with a 1. fdlipd weh qrmk ogxgtxhf wyepp jofrmu bke iufqh ghqrjhxkp efcm