Cheap 6" pneumatic wheels from harbor freight. Short sections of 4x4 post with 8 2x4 crossmembers. one on top and one on bottom cut to fit under the body at what ever points of contact work and set your own working height. Move it around to your heart content or even wheel it on a trailer and transport. This is fact, not fiction. I have one under my 57 chevy body right now and have transported it as needed. Cheap and easy.
