I haven't done a body-off resto on my Wagoneer, but I can share how I did it on a '59 Bel Air 2-door and a '58 Chevy wagon. I'm attaching the best pictures I could find. I built two wood supports, that were exactly wide enough to sit on 4-wheeled car dollies. My thought was that it would make working under the cars on the floorpans easier and also make getting the body off the frame easier, since the body would be supported from outside of the body. So, I build the wood supports higher in the back, and on the '58 I just laid a 4x4 across the supports and let the car's wheelwells sit on the 4x4 in the back and I let the car's rockers sit on the 4x4 in the front. Did pretty much the same on the '59, but in the back needed to work on the wheelwells, so instead of setting the car on the wheelwells I used a piece of 2" box-tube and welded a couple of pieces of tubing to the main cross-piece and the top of them I tacked to the body-mount areas of the car's floor, in the area of the wheel well. Hope this explanation and the pictures are able to be understood.
In order to lift the body, I used floor-jacks (and blocks if needed) under the frame to raise the cars to the height needed to get the body just higher than the dolly-supports and set jackstands under the outside-ends of the 4x4 supports or whatever area of the body I could reach. Then I disassembled the suspension, so I could lower the frame down far enough that I could roll it out from under the body on floor-jacks and/or dollies - I had to remove the rear suspension in order for the frame to be low enough to clear the body in the back of the car, where the frame kicks-up over the rear axle. I was able to do the body removals and reinstallations by myself, just using floor jacks, jackstands and various wood blocks - and beer
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Hope this isn't too confusing and helps a bit. Good luck!
https://photos.app.goo.gl/CBD5GKmc42VVG6GH8