That is a 79 Series LandCruiser, not an "FJ". Toyota designates engine "F" = 1F, 2F, 3F or 3FE, then J-Series Truck, then the model number, e.g. BJ-42, KZJ-120, FZJ-80, PZJ-76, BJ-60, etc. So a UZJ-100 = 2UZ-FE powered 100 Series LandCruiser with IFS. The 105-Series has a variant of the 80-Series solid front axle and would be referred to as a UZJ-105, if configured that way.
The 79 Series is generally diesel powered, likely by the venerable 1VD-FTE, so the truck would be sold as and referred to as a VDJ-79, not an "FJ". With a massive aftermarket supporting it, the engine can be tuned for 340 BHP and 600 foot-pounds of torque; the chassis can be extended by 300mm, up-rated to 4.2 tonne GVM and even converted to 6x6 with air-ride installed by JMACX. Would I do it? Nope. Will the 79 carry 3,000 pounds? Yessir.
An NPS, preferably a properly converted NPR, since the OEM version leaves much to be desired, would be a great platform for this box, preferably in the 109" or 132" wheelbase variants.
Finally, if you have never seen a box built by Bliss, Unicat or Action Mobil, you may think the product discussed above is just a box. It isn't. Total Composites is in a different Universe to this stuff. Habitats from the high-end manufacturers are damn near works of art.
