Ive bought worn out,beat,89-93 12 valves with 300-500,000 miles on them and drove them 2500 miles east with full loads in the bed and getting no less than 16 mpg.Only one failure and it was a flat tire so it don't count.Guys in PA are like rabid dogs to get their hands on them.
I bought a new 03 Dually Dodge,last year before drive by wire(I think) put 100,000 miles on it and when I mentioned that I was going to sale,,the words barely left my mouth and it was sold during a race at the Strip.A fist fight almost broke out between two guys pitted next to each other.
So My vote is Hummin' Cummins for sure.