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Originally Posted by Van B
I was talked out of it by a Busch Series engine builder. He developed the LS2 based spec engine for Busch East and Busch West. That is what is in my Camaro. Cheaper, better streetability, plus it was new, not some rebuilt race stuff. He had both to sell me, he just believes in the LSx potential.
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From a power production standpoint, some of the aftermarket LS1/LS2/LS6 style heads are flowing up to 340 CFM on the intake, and the LS7 style are approaching 400 CFM. Purely from a performance standpoint, the 18 degree or SB2 heads are not going to have much more potential if any. Then add in the requirements for special rockers and offset solid roller lifters ...
Now, the sprint car heads from Brodix, Dart, or All-Pro are probably the best flowing small block heads of all. If you were going to build a 450+ CID, 8000 RPM motor, those heads with a Kinsler or similar individual runner FI would make a truly exotic setup.