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Re: Carb size 454bbc
Got a 650 on my mildly built 454, runs great, but with the 4 speed it rarely goes over 4k. It gets there pretty quick though. Pulls strong from about 1800 up until I shift. That is on my 68 gmc. My 69 GMC flatbed with just about the same build, I put a 750 on it because it will pulling heavier loads and has an automatic and may see a few more rpm just for fun. No headers on either one, both have cast iron manifolds with a single 3'' exhaust
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