I checked the gap between the disc and PP in all 3 openings in the PP. It was about .070" everywhere I could check it. I am unable to get a feeler between the disc and flywheel anywhere. The disc comes off the flywheel briefly when the clutch pedal is pushed but then goes right back to the flywheel. When the clutch pedal is released, the disc again comes off the flywheel briefly before the PP pushes it against the flywheel.

I don't have a great explanation for this. If the disc splines were seized, it wouldn't come off the flywheel at all. If the input shaft was too long, the disc would still slide on the splines so it wouldn't stay tight to the flywheel.