It's not that I especially care about about gm products. I've never owned one. I'm just a little hung up on why a 5.2 sbm couldn't make similar power to a 5.3ls, with similar specs.
Seems the more sophisticated heads and intake are the biggest thing.
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Could SM/Edelbrock/TF heads be ported to a level to close the gap highlighted above? The LS head is doing at .500, what it takes the sbm head .700 to achieve.