My small lathe will not accomodate reamers of the bore size, so I will continue with single point tools for the boring and outside dimensions.
Could you put the reamer in the lathe chuck and make a fixture to mount the barrel on the saddle?
You could use the Detroit Powerstroke (2-stroke diesel) system whereby the air is force fed (super charger) via ports in the base of the cylinder. There is no pressure or fuel in the crankcase.
It would be great if you could find the time to put that knowledge down on paper.
I am in Australia, so I doubt I would ever get to one of your 'casting festivals'.