I had a slipping clutch on my 2005 Jinma 354 after letting someone use it w/o me supervising (not so smart). I thought I was in for the big job you described above. I just adjusted it using the set screw attached to the clutch pedal arm and damned if it didn't work again. I don't have may hrs on the tractor and I guess there is enough clutch left to allow for adjustment. I would advise to try that first before you split the tractor.