Dave's right about SACHS parts. We used them in the rally cars and the clutches literally outlasted the body shells.
I'm pretty happy over the short run with whatever Conover Motor Sports picked out for me, to replace the unsprung 4-puck metal monster I started with. We blame it for contributing to 5th-gear breakages we ran into last season. Get in touch with Cameron and he can tell you more, since I frankly don't remember...
KK