Have a 440 with stage 6 heads. Porter redid the heads and they look and work awesome. Cam is Hughes cam duration is 282 intake 251 exhaust.lift is 613 intake 626 exhaust,12.7 comp, 4.56 gears, 8 inch a-1 converter. with trans-brake.Car is a consistent 1.52 60 ft times. Car will run 10.70 at 126. Need intake with better bottom end. Car is 67 Barracuda that weights 3300 lbs.mono leaf with Cal Tracs and Rancho 9 way rear and 90 10 fronts