I used a 2'' body lift. When I put the body back on with the AOD in place, I measured 3/4'' from the highest point of the trans to the closest part of the body. Now that is only 1/4'' of interference. you could bash in the floor to get the room, or lower the trans mount some, or install 1/2'' spacers in the body mount. Or install a 1'' body lift like everyone says to do. Messing with body mounts suck's. You could cut out the part of the floor that hits the trans. It is a very small area. Then weld in some reinforcement. The work would not show from the top.
Bax