I built this setup in the xtracab area. Holds all my tools in soft bags, hydro lines, rod ends, power tools, recovery gear, axle shafts/birf, spare driveshaft, and some fluids. Action packer in back gets the Bunn welder and a couple of modular pack out style bins for miscellaneous hardware and small spare parts.
Having all items secured in the cab is a must for me in case of a flop/roll.