Your thinking on the air bags is probably right. They are just what they seem, you inflate one, usually the right rear side, to keep the side with the air bag from compressing as much on launch. Really helpful for keeping the car more even and getting straighter launches. At the very least on a posi rear, it keeps equal traction on both sides when setup right, if that's a problem.
In any case, to fix your problem I wouldn't start with air bags first to correct the tire hop. The ideas listed above are a very good starting point.
Tony
[This message has been edited by Ox68 (edited 05-23-99).]