Check out the latest 5.0 Magazine. THey test a bunch of intakes on a warmed over 306 motor that they bolted an S-trim on it.
Almost every intake was 501rwhp.
550rwhp is more porting of heads and intake, and stouter cam... But you are playing with fire at that level of hp IMOHO. Its a matter of time before engine lets go at that power level.
Also, compression is too high. You dont need to back down to 8.5:1 or nothin, but 10:1 is not optimum for boost. Whether its only 8# or 12# (recommend that range).
p.s. 500rwhp is about my goal for this spring.
