When I put my convert on rotisserie I used braces on the doors. These bolt in where the hinges and latches go. I have these sitting in my barn if you want to borrow them...you can use the rotisserie too if you need it. I'm in SouthEast PA.
Ray
I didn't have any rust problems on the rockers or the transmission tunnel so I didn't remove them.
Before I put it on the rotisserie I did have it supported on a couple of sawhorses with 4X4s along the rockers...I think that would work as my rockers were solid and I still had the doors on.