Forget a ctd powerwagon I wanna see a megacab powerwagon. I think it should be like an accesory pack that adds the 4.56 gears and lockers and new tires and stuff like other accesory packs so that anyone could have that capability. Would probably be cheaper to make too.
The powerwagon is already too big for offroading. No way it would be applied to the megacab, it would be too long and too heavy. If anything the powerwagon should be available only on rc/sb Rams.
x2, the 4.56 gears in the powerwagon provide all the low end torque it needs. There's no need to put the big 6.7 cummins in it, the thing weighs too much, the front end will just sink in the mud.