If you get some 4x4 posts or other solid lumber that's longer than the body is wide, you can lift the body and put the posts cross-wise between the body and frame. Then the jack stands can hold the body up outside of the wheel track. You'll probably need to do a little carpentry and add blocks to put the support where you want it and not just on the rockers. You can get the jack stands higher and higher with cinder blocks, lumber cribbing or whatever. Assuming you'll be using your floor jack in a non-standard method (extending it with chunks of lumber or whatever), just go a little higher in each corner at a time, such that if the jack were to kick out, it would still be sitting on the other 3 corners and your hands wouldn't be between parts.
Don't forget to disconnect E-brake, Steering shaft, Transmission and T-case linkage, Hood cable, Accelerator cable, Engine wiring harness at firewall, AC lines, heater hoses, Fuel filler neck, Axle vents and probably some other stuff.
You might also reach out to friends to see if they have tall jack stands, or other tools that would help.
