Have a look at the image below, I used a piece of square section tube. I laid it across the cross member and marked my holes. I used the suspension tower mounts, but next time would use the heater and brake master cylinder holes instead, it allows more access and avoids the need for looooong bolts.
I had to insert a piece in between the that and the round tube as you can see to adjust the rolling center to clear the lower lip of the speedo hole.
The U-bolt you see needed to be tack welded to the tube, as there's not enough braking force available from just one to lock the shell in place. The same occurs in the back of the car, but I use the holes the shock absorbers/ hydro return springs attach to.
There are holes in the engine stands so that you may rotate and lock an engine block in place, I drilled through the steel pipe once it was in place to allow the same to happen with the shell.
You can knock up a purpose rotisserie from steel just as easily and save about a hundred dollars into the bargain over the one I made. This one was created however in about 45 minutes, and didn't need a drop saw or heavy use of a welder. Its a slightly easier process for a quick stand if you are not prepared (or have the room) for a bit of extra heavy fabrication in the workshop.
I might be able to borrow a couple of engines stands, which would just leave the pole / attaching part of the process. Not having any welding skills whatsoever, this might be the safer way to go... 
haha
