[Retro]

Depends on what its set at, 300 hp 850ft/lbs torque, 330 hp 950ft/lbs torque, they range anywhere from 180hp to 400 hp and up. My 77 was a 210hp we changed the fuel plate and bumped it up some, havent put it on a dyno but it goes like a scared bear!! The 76 is a factory 330hp it goes good also. One issue with them the more fuel you add the more heat needs to dissipate, they are still a 505 cu/in engine. These engines are in thousands of motorhomes and busses everywhere.
I remember starting my old 555 cummins, it would smoke raw diesel until it warmed up, not something my fellow campers would have appreciated. My 8v92 was ok that way but that ol 555 was not an efficient engine, very underpowered as well.