This set of pictures shows the sequence for putting the unit back together. The only new parts were two gaskets, two crank seals, and two rings. Total cost $18.
I put in two crank bearings, a piston, a bearing and pin for the piston . All of these parts were salvaged from seized machines at dealer. You can see some scuff marks on that piston on the skirt. I don't think that will be a problem since I have used ones before worse than this one.