Anything with a 1993 or before 6.5 liter diesel engine would be my vote.
Mine has 330K miles on it, there is no electronics at all - the glowplugs are triggered by a switch on my dash, the injection pump is 100% mechanical, so the fucker will survive an EMF blast to boot. The military uses these blocks in hummers- simple to manufacture and repair. They are also still in production for this purpose.
Bonus: The old fuckers will run on anything to include frying oils (newer diesel designs won't do this easily)... not saying that I do it, but you could, in theory, easily obtain kerosene or "offroad only diesel fuel", which has no highway tax added to it, and it will run just fine. Diesel also stores better longterm than gas will, and happens to also run the generator for my house and tractor. Building a fuel dyke at home is a must if you intend to have any autonomy during a crisis.
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