New tow vehicle...6.4 hemi or Diesel?

Cummins all the way. I have owned Cummins trucks 1995, and my newest is a 2012, the last years before the diiff additive. I will never sell it. The comfort and safety knowing you can pull 20,000 plus, and have tow/Haul along with the engine brake. In the Mountains with 12,000 the truck laughs at the 7% Inclines,and declines.

In 2016 I travelled to western Colorado to pick up a79 Cordoba, and had to run through Wyoming, with 8000 plus altitude. There was a stretch running 80+ when a fancy BMW super duper SUV tried to pass me. I didn't care, but the higher we went, the slower he got. I finally lost patience with him, So I accelerated, pulled in front of him to pass the slower semi. I blew him off and kept trucking. I finally stopped somewhere along where the wind was so strong you could go airborne. That guy stopped and pulled in behind me, and asked: what in the hell,is in that truck?I believe around (rawlins)
He said nobody has ever been able to pull that super duper BMW in the Mountains, let alone pulling 10,000 Pounds!

I said just a 5.7 Cummins, the engine was was bored so i went faster!