I agree with Chris, start with a good straight sub structure. The frame measurements are in the body assembly manuals. I was new to this and took the car to a reputable frame shop. They even gave me a print out of the specs before and after straightening. My car also had been in a front end accident and was well out of specs. Make sure you tack up and clamp all your apron pieces before welding in place. Before final welding you will need to hang your doors, fenders, hood, and cowl to see how every thing lines up. The location of all of these pieces will affect the location of the others. Being new to this hobby I overlooked this step and had to cut a apron loose at the front radiator support and move it out because my hood wouldn't fit. Good luck glad your giving it a try yourself it's very rewarding when you can do it on your own.