If you're replacing the tub, cut the bolts off with a cut-off tool. Don't fool around and waste time and get very, very frustrated. I usually remove the tub alone, and here's how I do it:

1. Remove the body bolts. 6. Remove the transmission hump cover.
2. Remove the windshield. 7. Remove the shift and 4WD levers.
3. Remove the hood assembly. 8. Remove the steering wheel assembly.
4. Remove the fenders. 9. Remove the heater hoses.
5. Remove the grill. 10. Remove the Engine comp. electric's and the fuel inlets.

At this point, if you want to do so you can strip the tub of the seats, roll bar, dash, etc. It makes the tub much easier to manage in the next steps, but it's not necessary. I've done the job both ways, empty and loaded with equal results.

11. Slip two 2X4's between the frame an the body so they stick out equally on each side.
12. Construct 2 sawhorses so that their at least 38" high.
13. Roll the CJ into the driveway.
14 Leverage one side of the body and the 2X4s up onto one sawhorse.
15. Do the same for the other side of the body.
16. Roll out the frame forward, it should clear. You may have to lower the tire pressure depending upon the tire size.

If you've done it right, the body should be off... Easy as pie!

17. Now take a 2X4 and, using plasterboard screws, fasten it to one side of the 2X4's that are under the body, abutting it against the outside of the tub. This locks the tub in place when you lower it to the ground.
18. Place your High Lift jack under this 2X4 and lift and remove the sawhorse.
19. Gently lower this side of the body to the ground.
20. Repeat steps 17 - 19 for the other side.

Now the body is on the ground on a "Skid." You can use the 2X4 skid to move the body around in the driveway...If you want to get fancy, hook a couple of eyelets to the skid so you can attach tow ropes. Again this is simple, cheap and easy, and if you don't have a lot of friends to help it's a workable solution. At least it works for me.