I had a 69 Willys custom, thats what they called the first ones. Loved it, had a 350 Dauntless [buick] T400, Spicer 20 TC and D44's both ends. Very basic, no electronics, A/C under the dash w/york compressor, warn hubs, 6 bolt wheels. Very quick especially after I added the 69 buick grand sport intake, 4bbl and a set of hookers. Most parts available everywhere, used alot of common parts available at tractor stores even.
Downside, $500 for a new fuel tank, Hours spent getting the electric rear window to work, all in-line fuses all over the jeep, had to build a consolidated fuse panel by hand and rewire the whole thing. Hard time getting brake shoes and drums but that might have been the D44's, that was when I knew nothing about jeeps and pre-internet days, neighbor gave it to me back in 87.
It got about 25-29mph as long as I did not open those secondaries, open them and you could hear the gas draining from the 30 gallon tank. I still wish I had it but I could not keep up with the rusting out floors. It was sweet though, that 350 w/hookers and dual thrush mufflers, oooooweeeee, our dog knew I was headed home while I was still five miles from the house
Check if rear electric motors are available for the tailgate, I never could find a new or rebuilt one, ended up winding my own 5 times or so till I got it right.