Hydraulic Clutch Problems

[66SuperSport]

Last weekend we took the Chevelle to Autobahn Coutry Club for their Blast Expo / open house. Let the wife drive the car on the track as it was a touring event only. No open timed laps at this one.
She had a blast and we had a great pace car driver. We were hitting about 100 on the straights and really moving through the corners. The car was fine and I drove it home with no problems. Took it out Monday and it seemed like the clutch was enguaging really close to the floor. Seemed to get a little better while I was driving, but not much. Went to move it on Saturday and nothing. The pedal went right to the floor. Checked the Wilwood master and the fluid is right where it should be. Can't find any leaks and don't know where to start. Not looking forward to pulling the transmission if we have to. Any ideas or has anyone had this happen? Seems like there is air in the system but no fluid leaks that I can find.

Thanks