Well, you got a camaro, underneath of it, there is a front subframe, a middle unibody section and a rear subframe ( if I'm not mistaken ), get an icepick and jam it into unibody crossmembers and the parts of the front and rear subframe, if it goes through, it needs work, if not, if it has rust, grind or sand it down then undercoat otherwise, just undercoat. Unibodys arn't that hard to fix, if you can weld, you can cut out old and weld in new, I'm not shure on the subframe part though.