I can't help much, I would say that you should try to ask people who are driving older cars and trucks in the area. My bet is that you will need to find a shop that does a good amount of restoration work, not just collision work. Be prepared for a large dollar amount as it is time consuming work.
I would try to find a way to check out projects that have been completed or are still in progress, find out more through looking around your area. I have seen guys get burned by not seeing the job quality before giving their project to a shop.