RoyJ wrote:
I think it is an old Continental F head engine. Various sizes up to 162
cubic inches.

http://www.stumpfweldingsupplies.com...aul_Manual.pdf

I'm curious to see what the compressor part looks like. Probably some
sort of turbine or rotary screw unit. If so, that would make it a later
model
It very much looked like rotary screw down low on the end of the
crankshaft. What are those weld patches on? If that's the air tank, do
NOT start the engine! This is a deathtrap, and the tank needs to be
replaced. If that is an oil tank or separator, then make sure it
doesn't see pressure, or back to the above.

Jon