[ChevLoRay]

If the drive axle stays in the stock location for the frame, I don't think there is any way for the engine to be too far to the rear. I suppose that it, when coupled to a gearbox, will extend significantly into the rear seat area of the crew cab body. My guess is that seating in the rear will be on either side of the engine, which would have to be covered and well-insulated.....for heat and noise control. Imagine a Humvee, if you will.

You could disguise the cover by making it look like luggage....heck, even to the point that you could buy some derelict Samsonite at a Goodwill store to hack, slice and dice into the shape needed to cover that big air pump.

I'd keep the radiator under the hood. I suspect the overall effect will be of a ginormas mid-engined tractor.....a tractor that would look like a truck.

Put in a 10 or 13-speed....that'd work. But I'd go for the Allison.