interesting
the most difficult part might be the specifications of the crankshaft
all other parts could be borrowed from existing engines, i would think
such as cummins 855 with there 5.5 inch bore, you have piston, rings, wristpin, and induction hardened liner
the conrod, and of course brgs
or a k series with its 6" bore,, with all the same parts available
with a welded steel crankcase, might be a fun project,,, and screw the epa
i wouldnt know why you couldnt adapt the mico bosch fuel system
with the availability of laser cut steel, water jets etc,, the need for machining is decreased
with a k series cummins they have individual heads, so the cummins head could be used, as well as the
injection system,, cut down a camshaft, maybe a monster twin!
makes you wonder what parts could be brought together to build a large bore, long stroke thumper
with many parts that already are in existance,,
they build locomotive engine with welded steel crankcases,, it would seem possible to do a smaller engine as well.
would be a noble project, with good drawings could be replicated with a parts list.
"things that make you go hmmmm"
bob g