You might consider just polishing up the input shaft with some emery paper to help the fit into the bearing.
Mine was the appropriate bearing but did require polishing for an easy fit.
It helps to ratchet strap the clutch fork to the cross member to keep it from wiggling around
Have an assistant pump the clutch a few times when its real close.
Did you check that the input shaft fit over the pilot bearing?
Headless bolts as noted above helped me.
see post 67 on for what I...