Editing Choosing an engine for a GM A/G-body
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I am needing to know which engines will fit in a 1967 gto I am wanting to find and restore a gto and i might have a body and frame I just need a motor I have a 400 out of a '76 Grand Prix in my '64 Tempest... good luck if you are trying to retain the original transmission you could look for any pontiac v8...another thing to look for is if the trans is a duel bolt pattern bell housing..some except chevy motors and bop and some are just buick olds pontiac & cadillac. The easiest motor to find would be a pontiac 400 but with a car like that a little searching you could find a pontiac 389 and have a real nice car...good luck Although a 389 would fit in this car it would not be correct as 66 was the last year of the 389. The motor that was originally designated for the 1967 gto would be a 400. Motors from 55-61 are a bit harder to find parts for (intake and heads and timing covers/water pumps are different) but would also fit. Since the car does not have the original motor and would be discredited for this if it were at a car show being show as an original, I would suggest the biggest motor you can find and have some fun. Any pontiac 301-455 would all bolt up to this frame and transmission. 455's have gobs of torque and there are many aftermarket parts now availible for these motors including stroker kits for the 400's. I'd also go w/the 455. You will want to go with the "large" round port heads though. (Ram Air 4's are the best,Ram Air 5's w/high comp.pistons,or HO's.) I'm impressed with the horsepower & ease of streetability in the large Ponchos. They bolt right in however, most driver's side headers need slight modifications. There's limited space (using such large primaries) & 455's are one of the few powerplants that require little backpressure.{in high peformance aplications} Remember: those 67's are extremely heavy for a midsize Gm body. The added cubes come in handy. You'll also want to stick with the 400 turbo.
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