I'm Heartbroken. Time to face reality that my Cuda is a parts car.

Use jack stands and thin steel shims and shim them between the jack stand and car frame to level the car. No concrete pad is level. Once level and the door gaps look good, brace the **** out of the structure and start on it. It's a good idea to work and finish one section at a time this way your not weakening it too much.

Take the engine, trans, rear, and suspension out of it "before" jacking and leveling the body. This will get excess weight out of it that may make parts like framerails shift and bend because its weak with rust.

Ideally if you can place the front stands on the framerails behind the rad support, and at the rear shackle areas that's what you want to do. Once its level and you cut into it, do NOT move the body until you have all your structural repairs done and it's got its strength back. Since this may take some of you months to do, figure out where you want the body to camp out while you do this.