David was right
I got the new disk installed Thursday night, but had some trouble getting the transmission back in... Friday I bought a harbor freight trans jack (looks like a scissor lift) and it worked great. Im not a big harbor freight fan, but that was money well spent. The trans went back in easier than ever before. While I had the transmission out, I tore it apart and put Mike Pucketts CF 1-4 blockers back in and used the solid brass Cobra transmission 5-R blockers. I filled the trans with 3 quarts of ACDelco 10-4006 Synchromesh Manual Transmission Fluid and one 4oz bottle of Motorcraft XL3 Friction Modifier.
Ive driven the car about 70 miles now. 3 completely cold starts, probably a dozen stops, and who knows how many stop lights without a problem.
Looking at the old disk, there is not an obvious problem... at least one that I can see. Thinking back on things, when the motor was built, the clutch was installed brand new. The car had maybe 1 mile on it before it hit the dyno for tuning. So the brand new clutch got repeated full power pulls without any real break in. Maybe this was the cause, because this issue has been a problem for 4 years, ever since I got the car running again. The problem became more pronounced once I installed the B&M short throw shifter. So, a big Thank You to David for his advice on this one. Its really nice to drive the car, without having to fight it into gear. Its like it should be now.
In case anyone ever needs the part number for the Centerforce Dual Friction Disk... its part number DF281226