Thanks for all the pics. That gives me a lot of ideas. The best idea is to bring my car to your shop for the frame rail replacements. Too bad you're so far away. The next idea is to use the bumper bolt holes to locate the rear of the rear rails and the front of the front clip. I'll have to study my car to see about the mid supports. My car is straight and doesn't appear to have ever been in a wreck so I can probably verify and get good original measurements. I'm close to an Alro Metal Supply outlet and the generally have good tubing cutoffs that they sell by the pound. I don't think I want to spend for I beams since this is probably for this car and maybe one other. I don't ever plan to do this for anyone other than myself and maybe a friend or one of my sons. I think maybe a truss structure like you have under that first Duster would be the way for me to go. I'm assuming I'll need to do a full trunk pan with the rear rail replacement but I'm hoping to save the front floors. I'll have to drill a lot of spotwelds I guess.