Hmmm. I hate to be the bearer of bad news. I think you need to have a long and hard look at the integrity of the structural elements in the rocker panels. Fixing them properly requires a lot of skill and dedication and will suck up a lot of time and money.
You may find that this thread, this thread and this thread give you some important hints how important and complicated the rocker panel issues really are. Although these threads document work on 2600 cars, the structural issues are the same on 2000 cars.
Furthermore, you may want to check out Don Peterson's approach to build a rotisserie in this thread and his excellent restoration report here.
I'm sure you'll find the combined expertise and advice shared on this board very helpful.