flywheel HP, Engine has 6pack replacement pistons, cam is hughs 536 lifthydrolic,Stock 452 heads and has a rpm intake with 750 DP, HP is just estimated but i should be close. My dilema is I have never run a diaphram pressure plate myself though have heard many good things about them. I like the idea of the Dual friction Mcleod with the lever style pressure plate but i'm open to input as many have already.