I was camping/wheeling at Naches this weekend, so I haven't been on here to reply... Thanks for all the info guys...
After watching Donimator's Dodge dually diesel pull with a strap a '80s 6.2 Suburban that had a 20' car trailer behind it, with a K5 trail rig with 1 ton running gear and the trailer brakes pulsing on and off because they were wired through the hazard lights, up Chinook pass... I'm really liking the Cummings idea...
Oh yeah, also a ton of camping gear, tools, fullsize truck bed tool box, spare parts and all the stuff Don had in the back of his truck...