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*bump for GTX MATT* opinions on my cam choice 6400 summit ? or would the tried and true .509 be a better option ? cam recommendations are always welcome

-Mike

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How racy/radical do you want it to be? At this point you're upping the compression, you're going to give it good induction and exhaust, pretty much everything it needs with the exception of gear. If you want it to run harder NA I would go with the 6401. I'd stay smaller than the 509 unless you plan to go to 3.91s or more eventually though.

IMO the 6401 isn't too radical, and with your converter and decent compression you're not losing anything to the 6400 really. The 6400 is really basically a stock HP cam, or what people call and RV/Towing cam. I think with the 6401 it would be a 400-425 horse engine

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I ran a 400 for years with the .484 and .509 cam later on. I think the .484 was a lot better fit for my combo (only 8-8.5:1). I'd go with the 6401. Should run strong.