Alright, here's the deal. I have either an International DT/HT466 or DT/HT570 (not sure which of the four, it's a long story) at my disposal for the cost of crating and shipping. I want my rig to look like an 80's 1-ton crew cab. I'd like it to be 4wd but I guess it's not an absolute neccessity. Ideally, I'd find a crew cab, sans drivetrain, and run a 466/570, 9 speed fuller, divorced 205, and a 14/60 combo. I don't know if the 1-ton axles would hold up in terms of weight and power. However, going medium to medium duty axle(s) would be a lot of work and expense. People swap 6bt's into chevy's fairly often, and the axles in them hold up to the weight and power. A Navistar motor is 300-400 pounds heavier and has the potential for quite a bit of power (1150 ft lbs in the HT570). Another potential problem is the frame. I'm not sure if a 1-ton frame would hold up to the weight and power of the combo. I can't go to a medium duty for a variety of reasons, I can't get it registered as an RV without a TON of work and expense and without that insurance and registration is sky high. Soooo...do you think a 1-ton crew cab frame and axles will hold up to the weight of a 1400-1500 pound diesel, giant iron transmission, 205, and 1150 ft-lbs of torque...or should I just abandon the whole deal and find a better way to do it?