Got to the point where I wanted to inspect all the bearings. Here's what I found out when I was checking the first rod bearing and I pushed the piston out- a fair chunk of piston between the ring grooves was just held in by the rings and bore. Fell out into my hand. Rod bearings are pretty worn, but no scratches. Cam bearing is DONE, pieces stuck to the pickup screen. Looks like it was eaten by acid. Yippee.