Heres a link for building a rotisserie
However I found for me a better way was to build 2 frames that bolted at the front to the suspension subframe bolt holes and the at the rear to the shock mounts. The car would sit about 18" off the ground on a rectangular frame with castors. Heres the clever bit, a curved box section (could be straight bits welded togother,radius about 800mm) then swept out and up through the wheel arches allowing the body to roll just over 90 degrees and be stable. There was additional strengthening bars so that when the car is rolled over the it didnt bend the box section. If you can imagine and old fashion sledge, take the runners off enlarge them and fix to your car.
The advantages:
Easier to make than a rotisserie
Bolts onto the parts of car that dont rot-no worries about jacking points
Easier to wheel around
No worries about it rolling back because of centre of gravity
easier to roll-I could do it easily all the way with two fingers
Way less problem with sagging sills bending-fixed closer to middle of car
Small for storage/transport
Doesnt take up additional space in the garage especially if its a short one.
Can be rolled and skidded back to centre of garage
Disadvantage would be not as quick to roll the other way and may get in the way of work being carried out. I would say though I never found these to be an issue.
Dont have any photos and unfortunately I cant remember who I lent them to. Just thought someone might be interested.
Rotisserie alternative
alternative
go to my photobucket site and look at the early on photos of my car. you'll see several photos of the car in a rack that allows it to be held solid yet be rolled 360 degrees without it tipping. http://s606.photobucket.com/albums/tt142/65beam/
alternative
these belong to the shop that does my work. he built these many years ago.they secure the body by the front crossmember bolts and the top holes for the rear shocks. they are in sections that bolt together.he has square ones and also octagon shape. one person can roll them . there have been many tiger and alpines in them over the years. after removing the car from the rack,he has a unit built to bolt in place of the crossmember and the rear one bolts to the front brackets for the rear springs. these are on wheels so he can roll the body around the shop. these hold the car roughly two feet off the floor.