I am planning to re-build my Girlfriend Grandfather's 1953 3100 5 window pickup. It was a used on their farm and actually the body is not in too bad shape. There are some dents in the fenders a little rust but all in all not too bad. What I plan is to buy a complete new frame for the truck. I decided to go with complete new frame rather than doing the front clip thing. I wanted to run the supension on air bags. I know there are several manufactures of these frames. Does anyone have any recommendations on which manufacturer I should choose?