This machine has been sitting since 1982. The pistons were frozen on the wrist pins in the position they stopped at when last run. Not real easy getting the keeps off the end of the wrist pins either. But, with a little PB , a little heat(not much, just enough to expand it, not cook it) and an air chisel with an 8mm socket on the end of it, the pins came out easy and with the added bonus of heat and the jarring of an air chisel, the stuck rings shook loose too. The 8mm socket needs to be replaced because it was softer than the pin, all the parts look good , no cracks breaks , or any other visible damage. And it only took an hour, wish I thought about this maybe 4 engines ago. Now ,it''s time to take the engine out of the craddle, split the cases and see whats what in the lower end.
I have 4 other seized engines in craddles, and this is the way they'll be coming apart, saves time, effort, parts and general irritation.