I would go with a Cummins. I can't do without the 4x4, but if you don't need one, the best truck I've ever towed with was a '96 3/4 ton 2wd with 5-speed and 3.55 gear. That thing was awesome.
1969 Dart GTS 340 1969 Super Bee X9 N-96 1969 Coronet R/T X9 N-96 2015 Dodge Dart GT 2019 Ram 2500 Big Horn. Looking for the original block for my Bee. The last 4 are 7449