Okay here is what i'm building. chevy 421 stroker, 6" manley forged 7075 alum. rod. Eagle 4340 crank, 10.5.1 compression, Lunati hyd. roller cam 242*-252* / .560-570 lift 112 lobe centers, heads afr 210cc competition weiand team g manifold 3000-8200rpm, 825 B/G race demon carb, 1 7/8 hedman headers. with 150# nos, 4000 stall converter , t400, 4.56 posi-trac. hope to get into the 11s with this combo. hope this has enuff torque/hp.