Well, I know this does not apply to your truck but it is a Land Rover, a 1960 Series II Land Rover Dormobile:
Donaldson air filter and prefilter. Spare tyre mounted with the more robust military hold down straps, bonnet latched by the military latches, removable handle pick axe head stored on the bonnet, shovel mounted to the top of left wing, wing top protectors mounted on wing tops for extra strength when wing walking for access to the roof rack. 4 Hella 3000 aux lamps (2 euro beam, 2 fog). Spring loaded limb lifter wires to protect the heated windscreens from strike damage.
Mercury winch which has never been stalled in a single line pull.
The drum holds 125 feet of 3/8ths cable
Built in 5 gallon horizontal mount propane tank that feeds a two burner stove with broiler. Built in 15 US gallon stainless steel water tank. Electric pump feeds two sinks.
Three fuel tanks two front and one rear for a total capacity of 42 US gallons.
Front disc brakes & power steering
Drive train
Engine - 1970 Ford Mustang 302 V8 with 1991 Mustang EFI system
Gearbox - Borg Warner T-18 with Series Land Rover transfer case. Ashcroft high ratio kit installed.
Front - 24 spline SeriesTrek front axles, TrueTrac carrier, KAM 4.75:1 R&P gears, Range Rover classic carrier, custom Great Basin Rovers front propshaft with high angle U joints and long slip joint.
Rear - Salisbury (Dana 60 built under license in the UK) with hardened axles and drive flanges from Great Basin Rovers, ARB air locker, custom rear propshaft from Great Basin Rovers with extended slip joint.
Tyres - 255/85R16 BFG Mud Terrains mounted on Discovery I steel wheels.
All this provides a first gear low range axle ratio of 70:1 and 65 MPH cruise engine RPM of 2650RPM.
Rear interior fully packed to be out on the trail for longer than 1 week.
Yes there is a refrigerator and toilet.
The auxiliary battery is just below the fold up jump seat and the 12V air pump is next to the jump seat at the rear interior of the vehicle.
Set up for cooking
Set up for doing dishes
Set up for camping
Set up for travel
There are at least a dozen or so additional mods specifically for expedition travel that I haven't mentioned, but I figured that I have bored people enough with what I've mentioned so far.