The clutch disc in my 960 is composed of friction material bonded to both sides of a steel plate. The friction material is extremely brittle and has broken in the area of the drive pins. When it comes time to replace it I'm going to use a solid aluminum disc like Brian Miller describes in his pulling pages. If you bonded the material to a steel disc it might work but keep in mind that there is very little travel in the release mechanism so make sure that it isn't too thick.
The tractor i'm using it in is a Ford LGT 100. I'm putting a Cub type disc clutch in between the engine and the right angle drive gear box and I have some other plans for the area where the belt tightener clutch was originally. what I need is a 3" or so pulley on the clutch end of the engine---kinda like your 960 Mtd. The drive plate will be on the face of that pulley, then I can run a hyd pump off of that pulley. We'll see what happens.
I thank you for your input.