The box is 13.5' l x 7' w x 6.5' h and is mounted on a 3 point mount like the one Carl designed for his FG and Big Foot camper.
The truck, the camper, interior, 2 x 33 gallon tanks full of diesel, 3 deep cycle batteries, 18 gallons of water (now 30), spare tire, tools, spare parts, kayak...