I found taking the bodies off these for chassis swaps is a real pain. They are so fragile you almost need to build a chassis to move the thing. If it were me I'd patch up the chassis best I could without removing the body. Just lift it as much as needed. Saves a ton of work.

And go nuts with the rust proofing. 2000 P38 4.0 HSE auto - RHD - just needs a little love.