And I finally got around to checking the clutch disks.
As I mentioned at first, I am having issues with the clutch slipping in 5th gear.
The measurement I show is the smallest I saw on a given disk.
Odd disk Specs: Std 3.45 to 3.55 Wear Limit: 3.15
Mine: 3.45
Specs for the other disks:
Std: 2.92 to 3.08 Wear Limit: 2.62
Mine:
Disk 1: 2.85
Disk 2: 2.87
Disk 3: 2.85
Disk 4: 2.84
Disk 5: 2.90
So, disks are all at or below the lower "Standard" thickness, but not down to the wear limit.
The springs are still within spec.
Pictures of the disks are here:
http://imgur.com/a/RhTYOThey look OK. Not glazed, not burned.
I am getting a gently used clutch to replace mine.