[jiggs]

Take it to a body shop, NOT a welding or machine shop. The problem lies in that most body shops won't have specs that go back that old. Do you have a pic available so we can see the extent of the damage? Did you hit straight on, or at an angle? Is the rail kinked, bowed, or pushed straight back? These are all variables that will affect the labour required to straighten the frame.

It may be a good idea to ask the shop if they want your sheetmetal for alignment purposes. That way, they can align everything at the shop so that they know the frame is straight. Without the specs, its the only way to know for sure the repair is accurate.

Also, ask the shop foreman or manager how often they do full frame repairs, and if they have a full frame specific frame machine. There are a lot of shops (in my area, anyway) that don't do full frames anymore.