Regarding the ‘burb, it was originally an all-mechanical diesel. I’m retrofitting with a HEI-fired, carburetor engine, and mechanical transmission. I’ll store a spare HEI distributor in a metal trashcan (good Farraday cage), “just in case.” While my instrumentation may get fried, with a fresh distributor stabbed in (takes about 30 minutes to swap), I should be good to go. The cool thing is that HEI is completely self-contained. All you need is a hot lead to the battery, and you’re good to go. In that aspect, it’s eminently more practical than electronics or the old points-and-condensor ignition setup. Less stuff to go wrong, and any decent HEI setup will run 100K miles without a burp.