Conversion rod bearings for Babbit rod engines have been around for over 50 years, but they're getting scarce and expensive. I'm working on a conversion to Perkins Diesel engine rod bearings for stovebolts that are plentiful and cheap, but the crankshaft need to be ground to fit the bearings. That's also an advantage, as it can salvage crankshafts that are supposedly "worn out" and ready to be weld-repaired or discarded.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!