Did you mention whether you tried cranking the engine since repairs yet? I've heard of people replacing engines thinking they were seized only to...
Update!! Alright, so welding a nut to the existing portion of the shaft worked. It came out easily. I installed another shaft with new bearings...
OK, so I have a 1975 Seaport 23' with a chevy inline 6 (love the engine) and I had to recently purchase a replacement upper and lower gearcase....