Hi Shannon and SimRice,

I have made a few observations from your photos and they are as follows,

1, Your clutch body is definitely too close to the engine, thus the whole assembly is running closer to the engine than it used to do, yes your witness marks on the shaft are telling you that.
2, when your clutch is in the engaged mode it looks like there is not that much cork left inside the clutch half as the cone comes out a bit too far.
3, There is also probably a tad too much clearance between the thrust pad and the clutch cone when it's in the engaged mode.
4, The main issue here maybe the alloy clutch housing itself ???

I have to ask, when you slid the clutch body back onto the engine PTO shaft, did you experience any play (wobble)?? if so that's probably where the issue may lie. I suspect that your body is not running true and it slightly grabs the cone on unloaded higher speed.

Until we clarify that information I can't see it being much else, but your clutch is definitely too close to the engine.

Cheers,
BB

I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.