I've had this engine disassembled, parts in boxes for a long time. I finally made some time to put it back together to see if it would still run.
I made one new gasket and replaced some missing bolts.
It still needs a really good cleaning. The bearings are gummed up with very old grease and a worn/missing bushing on the power piston connecting rod is making some noise, but otherwise it seems to be in pretty good operational condition.