I worked in an aluminium foundry many years ago for short time.
I have been involved with tooling and machining, in one
form or another with many different materials, for most of
my life.
I would think these engines could be aluminum except for the
obvious crank, rod, wrist pin and most of the fuel system....etc...
Wood forms, or "patterns", and sand moulds would work fine.
Lets see, crankcase, bearing holders, cylinder, crankcase door, intake, exhaust manifolds,
head, water manifolds, cast valve cover ( that would be nice ! ) and probably a few other parts
I have forgotten, could be done here, in the USA. Other parts could be imported : crank,
rod, fuel system.....etc.
A Google search provided several aluminum foundrys across the USA.....
Any thoughts?
Gary