Thrust Bearing- Abnormal Wear

The smooth part of that input shaft seems mighty long to me.

Yea it does.
I also agree on the little ring in the bottom of the crank register.
(Looks like it was pushing the crank forward)
Just for kicks I'd take about 1/4 in. off the end of that input shaft, but only if the pilot bearing rides far back on the shaft to allow it.