I've got one of the Onan/Cummins turbo Diesel inline sizes that UPS used interchangeably with 292 Chevy and Ford 300 engines in their delivery vans. It's rated at 120 HP at 3600 RPM, and I've had one on the dyno that confirms those numbers. UPS retrofitted their trucks to a different Diesel when Onan couldn't supply enough engines to meet their maintenance needs, and sold the little engines in running condition at scrap iron prices. Mt friend bought 10 of them, and gave me one for storing them at my farm for a while before he flipped them for a pretty good profit. The engine has a bell housing that accepts a GM SM 420 transmission, or any other with the same bolt pattern. It's also got a 12" diameter clutch.
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!