I have a ram 5500 4x4, 2500 4x4 and a powerstroke excursion. I have a 6.7 ford at work.
I don't like aluminum bodies and the awful turn radius of the ford. The 5500 4x4 is the obvious king of towing and stopping big loads. My best scale so far has been 38k and it was no issue.
The 7.3...