Theres not a lot of info / tests / anaylisis about, on these engines.
Stuff ive seen said the first lapped piston unfinned head versions ran hot / overheated ,
so were duely changed to twin ringed alloy piston and finned head .
Im particularly intrested in the crankshaft diameter / case shaft bore , Bolt head pattern / same as .60 B.B. ? , and cyliner outer diameter / case cylinder bore diameter .
Unless you waNNA DONATE ME AN ENGINE ! .