Same weight, same cid, a Pontiac will never run with a hemi, 481x, bbc or bbf, period. IMO, the Pontiac can be competitive at the small block weights with either a 136 blower or twins. I would use a billet block with either the bes/butler pro ports or billet heads. I would lean towards a billet head with all of that cylinder pressure. The big but is, if you have a billet block and billet head that does not have the factory port layout, is it still a Pontiac? If you are buying billet pieces, why limit yourself to the Pontiac bore spacing. Just makes sense with your dollars to just go 481x or hemi.
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