Add some race fuel and bump up the timing. Otherwise, I'd be looking at a cam change if you want to stick w/ pump gas. Do you have a reconmendation on which direction to go with the cam? Fast68plymouth here on the board is the cam guru. Porter Racing Heads 802-951-1955
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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