Oh my goodness!!! This is the EXACT same box as mine before the conversion but on an older chassis. I was so confused I had to check the VIN.
For anyone looking for a base vehicle with incredible insulation, this is it. I've been completely comfy down to -15F with an espar D4 heater.
Check out the previous owner's build thread from before I started my own mods:
The Dirt Lab
Be careful with that 6.0 even with bulletproofing. I had to put in a new long block in mine due to lifter failure. This rig is a great buy just for the box; I'd trash the engine and put a new one in from the get go.