My 86 has the IDI Detroit that was in your CUCV. I love it. The only electrics are the starter, glow plugs and the kill solenoid. It doesn't love pulling a loaded toy hauler on the highway, but I've got it turned up enough that it barely will. That magical torque pulling "power" sure doesn't materialize in the real world, but it gets excellent mileage on black diesel. Pretty dramatic difference between that truck and my new Denali Dually Duramax that has all kinds of gadgets, screens and electronics for everything.