Throw out bearing

If you haven't I'd replace with a newer roller pilot while it's out. I've had issues like that in the past. Once I spent $$ to have a flywheel balanced to a 360. Assembled everything, new clutch, etc only to have the disk catch on the inside edge of the flywheel. Made a racket. Apparently I had a 273 flywheel or something with smaller factory clutch. Ended up buying a new Hayes SFI flywheel.