Quote: Headers are 2 1/8 by 30 with 4" collector 12" long. Heads are fully ported, I was talking about the intake being matched to the heads. Springs are 310 seat 762 open. The jets were 92s timing 36. I wasn't there when it was dynoed but my friend said no changes were tried. It even has a belt drive.
Without flowing your heads on my bench, it's really too hard to tell for sure...but your midlift #'s are very low! Header could use a bit longer extension, maybe around 15-16" total length but I'd guess if everything else is right, the heads may be the blame. See I said MAY be the blame...LOL!
