Would those heads be of any use with that cam set I got from you if bolted to a 75 350 block.I was planning to use that cam and wondered if those heads would help in making it breathe any better.I have a manifold ,single plane,I think Fatstax, called it and a carb(just a regular 4bbl) The block is out of a 75 Impalla and is currently running the origional 2bbl. Ed