Go all the way, add diesel and crank start (or bullet start) or possibly gas/impulse mags with crank start and no electrical system, I mean no battery.
You want this thing to be EMP proof!
Go big or go home.
Discussion
there is such a model too, the one built for siberia, with the crank, and it functions without any electricity too
https://www.ebay.com/motors/blog/lada-niva-a-soviet-era-legend-on-american-soil/
it's the AK47 of transport
even under such oppression the russians make this shit, i mean, just look at it
it's rough, and simple, but it works so damn well it's inspired
I could totally see myself driving that.
π