I think this is the information (5.9 liter Cummins-marinized) that was mentioned.
"H&H Distributing, a company in Angleton, Texas, manufactures a marine conversion kit for the 5.9, which includes a water-cooled exhaust manifold and turbo housing, heat exchanger, raw-water pump, marine bell housing, flywheel, and all necessary gaskets, brackets and fittings. Engines from 1994-97 Dodge trucks were 12 valve editions running 160 to 180 hp in trucks equipped with automatic transmissions and up to 215 hp for 1997 standard-transmission trucks."
Taken from website:
http://www.bertram31.com/articles/holmes/index.html
Good luck!