See my reply to your other post. The XR2 flywheel & clutch are larger diameter and the disk is a different spline count, won't work with the nonturbo transmission.
The stock XR2 clutch isn't all that great, IMHO. There are plenty of good ones out there however, ACT makes a damned good clutch. I have one in my Red XR2 and one in my GTXR2 which is paired to a 1.8L + turbo + grippy AWD. Never once slipped on me