I've said it many times before, but your combo shouldn't be giving you the reliability problems that it does. I think there is an oiling issue and a valvetrain stability issue that needs sorted out. Get those 2 issues fixed, and you will have exactly what you want. twocents

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