Hello,I need some help any one, I have a 318 y block motor in my dodge truck the motor is like a 1960 to 1965, if i pull it out will any 318 motor not a ''y'' use my same motor mounts and still bolt on my 904 tran? Any one? thank you!!!!!!!!!!!!!
I'm shooting from the hip, as I've never personally done this swap... But, I understand that the later "LA318" will bolt in where the Poly 318 used to be, so you should be good to go. www.allpar.com has everything you ever wanted to know about mopar motors. Check it out for some more info.
I'm sure someone with more definite knowledge will chime in sooner or later. They're probably just out in their garages actually building something... Got any pics of that truck?
WTF is a 318 "Y"? A Y-block is a Ford! There have been a couple of different incarnations of the 318, and the one you may be referring to is the 318 Poly, sometimes referred to as a "wide block" - is that what you mean? The '57 - '61 318 has early Hemi motor mounts, and bellhousing bolt patterns. The '62 - '66 (up to '67 on trucks and in Canada) uses the same early Hemi mounts, but has the same bellhousing bolt pattern as any modern 318. They're awesome motors, and retain about the same block & rotating ***embly as an LA 318 (post '67) as well as all accessories and oil pan. The secret is in the heads, which are semi-hemispherical. Best of all, you can get parts at any NAPA. For more information, you may want to visit us at The Polyspherical Engine ***ociation: http://www.geocities.com/polyman64 . At the top you'll find links to the 318 Poly Yahoo Group: http://autos.groups.yahoo.com/group/318poly/ and the 318 Poly Forum: http://www.diamondbackengines.com/forums/index.php/board,6.0.html There are many sources of performance parts out there, but the intakes are sometimes a little pricey. After seeing just what that old 318 can do, you may just want to keep it! There are several of us 318 Poly rodders out there, and you may be able to sell that motor on here, or on the 318 Poly Yahoo group... ~Jason
dude the 318 poly isnt that bad, they have good heads. now an abomiantion is a 350 chevy ohhh let the flames begin
God, what am I saying! The 350 isn't necessarily bad - hell, if it was, people wouldn't use it. It's just common, and seeing it so many times over the years, in everything, gives people the same feeling that the word "brah" illicits when being called that over and over by someone - it gets kinda abrasive. ~Jason
you might have to make some minor adjustments to your mounts but i dont think you motor should have any problems fitting in the engine compartment
You mentioned a 1960 Poly 318 and want to replace it with a la engine. (yes ""Why"" is a good question since the 318 poly was built stock in 57 and 58 to 290 HP) but since you asked. Here is the skinny. A 62 and later Mopar with a 318 poly will accept a LA 318 or 340 ***uming you read the above tips regarding mounts . A pre 62 vehicle (61 and earlier) with a 318 poly has a different crank flange and can be hard to put a flex plate on as it has no step and is 8 bolt and not 6 bolt. If you use the newer trans it is irrelavant. Also there are two different sizes of recesses in the back of the crank for the converter to sit in. Later engines are larger. An 318 poly with a reduced main size 360 crank makes a great motor. Mopar has this crank also already built listed for a 318/340. Polys and la 318s share the same crank dimensions. That gives almost 355 cubes with a 060"overbore which an early block like the old polys wouldnt even notice. Silvolite makes a piston that works in this combo. I dont have my files in the house but I believe it is a #1274 or something like that. I can check for sure if anyone is interested. We did one last year. Even if you left the factory cam and used the Fury 2x4 set up. (Many on Ebay every month) you would have reasonably, IF a 318 set up would give 290 hp stock then a 355 would at least give 355/318 X 290 =323.7 or 324 HP and will idle like your grannys buick. With any kind of a cam (I get 340 mopar stock hyd grind or profile regrund on the old poly cores.) you get a real nice working 340 - 350 hp motor that get decent mileage and has decent manners. Beyond that with more compresssion , judical porting and raising the intake port a bit at the manifold flange and in the end of the mating section of the manifold power goes up even more. We get new pushrods made by Mantron to the right length for hydraulic lifters and pushrods in these engines were notriously soft anyway. Everyday with the hard work of G Palovich and others more and more becomes available for these motors. Someday someone will built an aluminum race head for them and then everyone will want them. Other similar designed engines are the Chevy BB and the Ford Clevland and 429 /460 Ford. It is a good design with an excellant compromise not having the extra machining costs of a hemi but able to produce exceptionally good power. (I mention all this just in case someone had suggested to you they were no good.) When done up hey look GREAT I have read in a Hotrod book some years back the old fury 318 2x4 s would eat a Fuellie chevy for breakfast. (Article on Chuck and George Barris in an old hot rod year book.) I dont know if it is true but I have seen them in sprint cars in the 60s so they must have been fairly decent.
A bunch of the guys on the Yahoo Group stroke 'em and race 'em. And hell yeah they'll eat a fuelie for breakfast! Plymouth never got a Hemi until the 60s. Instead, they had the V800, aka the 318 Poly. And don't forget the torque!!! Dual Fury V-800 Standard engine in the Fury. Not available in other models. 318 cubic inches. 290hp at 5200 RPM. Taxable horsepower 48.9. Torque 330 ft./lbs. at 3600 RPM. Compression ratio 9.25 to 1. Bore 3.91 inches. Stroke 3.31 inches. Dual four-barrel carbs, high performance camshaft and resistor-type spark plugs, dual-breaker distributor, rotary oil pump, Shunt-type oil filter. Oil capacity 5 quarts. Low restriction dual exhaust system. Fury V-800 Standard V8 for all Plymouth models except the Fury. 8-cylinder overhead-valve V-type. 318 cubic inches. 225hp at 4400 RPM. Taxable horsepower 48.9. Torque 330 ft./lbs. at 2800 RPM. Compression ratio 9.0 to 1. Bore 3.91 inches. Stroke 3.31 inches. Two-barrel downdraft carburator, rotary oil pump, Shunt-type oil filter. Oil capacity 5 quarts. Full-pressure lubrication to all crankshaft, camshaft, and connecting rod bearings and to valve rocker arms and tappets. The Mobilgas Economy Run Champion. Fury V-800 with Super-Pak Available in all models except Fury at extra cost. Basic specifications same as for Fury V-800 above, except for the following changes: 250hp at 4400 RPM. Torque 340 ft./lbs. at 2800 RPM. Four-barrel carburator with matching intake manifold and special air filter. High performance camshaft and distributor. Special design free-flow dual exhaust system. ~Jason
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