My grandfather on my mothers side was dead before I was born, on my fathers side I think I was 7 when he died, that rocked my little world. So not much chance of learning there. Some learning from my father, (a lot), when not augueing. Lots of learning from schools and jobs.
As to the engine, seems wrist pin is seized in the piston and in the rod,( piston will not rock). When removing pin with puller, warm up piston first, it does not take much heat, even hot tap water run on the piston for awhile will raise temputure enough to expand piston bosses so most of the pulling will be on the rod.
This was some learning I showed a fellow who came into the shop complaining about the size I ground a crank to. Turned out the crank was in an unheated shop, about -35 and his mic was kept in the house nise and cozy, did not have a standard either. Draw your own conclusions.
Anyway, luck with puller and wrist pin.