I ran a 600hp 440 in my Cuda weighing close to 3,000 pounds with 32x14 slicks. Used a Hemi box with Liberty lugs. I ran it with a Ram B&B plate, and metallic disc. Never had any issues running as fast as 9.90. I know some guys running heavy pressure plates are using a rag disc to soften the hit. That might be an option for you. If you are tearing up Hemi boxes on a regular basis, you will probably hurt a Nash tranny also. A Long style clutch might help. They are available preset, non adjustable. The problem is using an adjustable clutch in a stock body. To adjust the pressure plate, you have to remove the trans and bellhousing. And it is a constant maintenance item. Clutchtamer might be the answer, although I have always been skeptical on higher hp engines and how fast it would eat up a clutch.