Baron, that’s what I’m looking to do with mine. I have a 65 421 block and heads that still needs to be built. Hopefully I will be able to fit air cleaners under the hood of my GTO with the bathtub. I think if Pontiac was going to do a 2x4 prototype test car the manifold would have been more of a low rise for hood clearance and air clearance. My idea is more of a home built day 2 street racer car. In other words, what if Pontiac offered the bathtub manifold over the counter for 65 and up heads. Anyone could buy it and put it on any car they wanted.
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