If you still have the option, take that centerforce clutch back. I used one of those once and it didn't last very long. Others have reported major issues as well. I'm currently running a Spec clutch, which so far is holding up fine. I'm with Aussie on this though...get a stock SVT clutch. My original was still working at 98,000 miles! It always gripped! We only replaced it because the trans was already out for other work.
Another major issue with clutch replacement on these cars is the machining of the flywheel. This is a two step flywheel...two surfaces need to machined to the proper specification or "step" measurement. You'll see when you get it in your hands. The dowels will be removed and that surface machined along with the clutch disc area. If this is done incorrectly, or not at all, you WILL experience premature clutch failure, not matter what brand of clutch you use.
My local Napa has a machine shop in the back with a really knowlegable guy running it. You'll have to check around. Don't just assume they can look up this specification...ask them before you drop it off.
I believe this specification for the step was posted in the transaxle fourm, but I'll have to look.