We have had taht cam in two different 451 combos, one with stock port window home ported Stage VI heads, 10.8:1 CR, M1 single plane, 1000 cfm demon, Hooker 2" x 44" headers; it made 649 hp at 6000 rpm and 612 ft-lb at 5000 with good torque even down low. Then a change to home ported 440-1 heads & intake, 2" x 34" headers and a 1050 dominator, the CR rose to about 11.2:1. It made 713 hp at 7300 rpm, and close to 570 ft-lb at 5600, and had absolutely no power below 4000 rpm.