The best “bulletproof” doomsday truck is a 1989-1993 or 1994-1997 5spd manual dodge diesel. You can remove the fuel shut off solenoid and get enough people to push start it. It will run on pure waste engine oil. I have done it.
My current truck is a 2008 Ford F450 with a 1996 dodge diesel Cummins, compound turbos making 600hp and 1200ftlbs. I am using the ford computer controlled automatic transmission.
I had a 2003 dodge 1500 with a 1994 dodge Cummins with a manual 5spd that I ran on 10% gas and 90% waste (used) engine oil (straight out of engine oil pans from doing oil changes). The was my truck for 11 years but we bought a toy hauler that was too heavy for the 1500 frame.