Since I have not done this swap with a 9" clutch before, I would also be careful about the diameter of the center hub. I'm assuming it doesn't matter what the diameter is, but you never know. Make sure it won't interfere with the face of the flywheel or the inside diameter of the pressure plate ring.
I happen to have a junk '83 S10 2.8L sitting in the garage with a 14 spline 9" clutch on it. If you need dimensions, let me know.
