How appropriate, I am pulling apart a neglected 68 transmission, but internal parts seem to be a mismatch of years. The pump looked like an original 68 style with reaction support having 24series casting number.

But the input shaft / rear clutch when disassembled had metal in the pilot hole that the output shaft connects too. Even to the point of the oiling hole solidly plugged. After closer examination the oiling hole on the shaft side is not in the typical bearing surface, it is closer to hub and partially under it. I will try to post picture later. Is this a 74 up shaft? Why not compatible. There was a metal thrust washer on the output shaft, but looking at the nose of the output shaft, it looks like it was hit with a ball peen hammer. What could be wrong that the input and output shaft are slapping each other and galling the metal which plugged the lubrication hole? Any thoughts. The clutches and bands are in like new condition. Someone but a combo together and it didn't work?