Tortion Bars and Camber?

I would check you toe in if it chewing up tires. This is more likely the cause unless the camber is really far out. like the other guys said check for worn components before getting too carried away. Severly worn lower balljoints will give toe and camber issues all in one. And lets face it the a-body front ends aren't exactly the toughest and most durable!

I agree, check the toe too. Camber is a tire wearing adjustment, but I've run as much as -1 degree of camber without any tire wear issues. On the other hand, too much toe in or out will chew up tires, and FAST. Camber, unless its way out, will usually take a lot longer.

Adjusting the ride height with the torsion bars does change your suspension geometry, and if you go too far with the ride height you'll run out of adjustment with the camber bolts on the UCA's. Offset bushings can help you get some more adjustment there.

But it sounds like you should definitely get an alignment before you put new tires on.