New 383 and bad clutch hop/ jumping at take off. Please help

[steveo3318]

Ok. Got my new 383 installed and everything it great. Brand new 12 inch heavy duty clutch. Just a stock replacement 180 dollar clutch. It does have a ram Sfi steel flywheel.

Here's the problem. Anytime I take of in first or reverse and try to slip the clutch it grabs/jumps/ hops the truck bad until I am completely out on the clutch. If I just quickly dump the clutch it is not as bad but i don't want to be spinning and chirping the tires every take off

Motor put out a little over 450 hp on dyno, full roller motor. Cam is 294/308 510/510. 226/234 lift at .50. Has 373 gears. Saginaw 3 speed. I am thinking it's the cam doing it. Can anyone please drop some knowledge on me about what's going on. Clutch pulls hard. Does not slip a drop and is perfect other than jumping