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I just think it would be nice to be able to run stiffer valve springs and have more rpm's. I'm guessing that 25#'s at over 5k rpm's is part of the reason these engines seem to start laying down at high rpm even with ported heads and bigger cams. I'd say the valvetrain isn't too stable with a flat tappet valve spring.
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.020" Diamond pistons, Ported heads (206I/196E cfm) comp. 212/212 cam, 9.1:1 compression. Turbonetics 66BB, Modified BGC 23 row interooler. Razor's alcohol kit. Turbo tweak chip.
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