so i am up in Worland, WY for work this week and i got a flat with the truck and as i was getting it fixed in town i saw a great looking F-550 work truck i think it was for Pump Service inc in worland, any way it was a cummins conversion there were Cummins C's all over it. Kudos to the owner good work

 

Far as I know the F550's come from the factory with a Cummins option.

 

F-650's did. 550's didn't, just the powerstroke.

 

Oh ok, yeah the 550's are the same as the 450's, I forgot about that.

 

That is one of the things I was thinking of doing for hauling my camper around.