olds 455 into a 74 omega?????

[82GPLJ455]

I gotta stuff an olds 455 into a 74 olds omega (74 wannabe nova).any idea what i need for mounts and headers or manifolds?

 

[Mike P]

As far as I recall everything should be bolt in using Olds 350 mounts and exhaust/headers.

 

[82GPLJ455]

Im taking an olds 350 out.i have all the accessories,brackets and pullies that go to the 455.i read somewhere that all the 350s pullies,brackets and accessories will bolt to the 455.either way i have what i need.

Also read that using the 350 mounts will set the motor and inch higher than it should be.said to use 455 block and frame mounts.says to use 69 cutlass with a 455 frame and block mounts.also said use 69 cutlass headers.this info wasnt specific to the omega,think it was talking about g bodies.he wants to keep the AC if possible.

 

[Bar50]

Olds frame stands are all the same height, the 455 block is taller, and therefore wider than the 307/350. The brackets and pulleys will work, need longer belts. You might get a away with 350 headers. I have collected many many many sets of headers over the years and have only seen two basic bends/sets for Olds motors, I'll take a few pic tomorrow and post em up.

It will all fit, I have a 1978 Skylark (Nova) with a 455 Stage 1 Buick and an M20 four speed.

Find yourself an 8.5 inch rearend out of any 70-up Nova platform car for a heavier duty rearend than the stock 7.5. It is a direct bolt-in swap. Some of the late 70's disco nova cars had rear sway bar set ups too.

Oh, buy a set of sub-frame connectors, you will thank me later!