Don, are you using a Centerforce type I pressure plate or are you using a II or III? What year bellhousing are you using? If I remember your earlier posts you added side motor mounts when doing your engine install. I have included a link for an information sheet that Centerforce put out regarding GM clutch forks and through out bearings.

http://www.centerforce.com/images/store/midway-industries-inc/CTF-CF165473-I93GM001.pdf