[Tom Vaught]

What size turbos are you hoping to run?

Some years ago a Pontiac Engineer named Skip McCully and I talked about using TWO of the
Pontiac 301 Turbo cast iron manifolds (one for each bank) on a 455 twin turbo deal he
was interested in.

He was going to use two of the 301 turbos on a custom draw thru deal.

I looked at the deal and saw some good things with his ideas.

If you could find two of the turbo manifolds you might save a lot of work on that plumbing.

The other option is to make two manifolds that look like upside down Chebby small block "Rams Horn" pieces. The FACTORY 421 turbo manifolds I had were cast similar to that
style but would not fit an A-Body car, only a B body car. (Possible F body too).
Not sure about the later years but know the 67-69 bird and B car swap.

Tom V.