[Jack Houpe]

I had a 5500 topkick truck with the Duramax that pulled a 50' enclosed car trailer with 2 cars and lots of other goodies with no issue what so ever and cruised down the highway at speed limit. The Duramax is found in pre DEF trucks and parts are everywhere in the country if it breaks down, foot print is small so you have that going for you. I know nothing about the 555 but what I have read and seems they have a weak crank. Duramax offers a lot of piece of mind.