I've got four retired UPS engines, Onan/Cummins inline 6-cylinder turbo diesels rated at 120 HP at 3,600 RPM. One of them is headed for a new home in a 54 Chevy pickup body on a Nova/S10 frame combination, and another is going to be a repower for my 87 F-350 flatbed. I've had one of them on the dyno, and it makes the advertised HP at the correct RPM. It's a real torque monster at low speed, too. It is just a bit heavier than a 235, but not much.
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!