3rd gen toyota xtra cab, tons and 40s, 118" WB, linked on factory coils, 5.3 LS, unsure about trans, 3 speed atlas case. Bed would be double bobbed of course, with a matching canopy. I'd build bumpers and fender bars from DOM, 2x4 .188 wall for sliders. Hot rodded 8274 up front, m10000 under the back. Wire rope in both, no winch rope for a truck that gets used. Build it with the flattest belly possible.
It would fit places here, and have the jam for the mud up north. Of course, as soon as I finished it, I would realize where I'd gone wrong, and start building a new one.