I run a conversion shop in Daytona Beach and use a lot of crate motors. For general street use, get the 430 and have a reputable cam grinder ( I prefer Cam Motion) make you a cam for your specific application. Downside, it voids the GM warranty. The 480 and 525 cams both have a lot of overlap so idle quality isn't great and you'll always smell raw fuel. I like PSI for harnesses and E38 GM PCM. There's a lot to be had in the tune, so find a good tuner.
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