10-5 compression merlin oval heads 750 speed demon rpm air gap intake 1 1 3-4 headers crane roller cam 610 632 lift
428 ci
416 hp 500o rpm 467 torque 4000 rpm
over 400 lbs of torque from 2000 to 5000 rpm
that rwhp it runs mid 11s in a 3500 pound chevelle with driver