5A heads

[86-blk442]

hey guys i just picked up a set of 5A heads and the A4 intake to swap onto my 307 with the 7A's. i know the two use different lifters for the cams, and that is my question. Can i use the roller lifters that are currently in the car with the new 5A heads or do i need to swap the lifters along with the heads when i have it all apart? The engine is a 1986 vin 9 307

oh and one more thing, are the exhaust manifolds the same for the 5A and 7A heads??? i know i have the cast iron ones, and from what i read on the Olds FAQ they seem to be the same.

 

[olds307 and 403]

It should all work, use your manifolds if cast iron and the pushrods from the 7A heads. The pushrods are longer on flat tappet engines.

 

[beeterolds]

the later stainless tubular manifolds have smaller ports.. u need the earlier ones..

use the A4 intake or a performer too.. toss that junk a5 intake in the trash the one you have stock has smaller ports and using it makes your head swap absolutely worthless!