[blucar]

I would suggest doing what many people have done to haul a vintage cat around. Put the body on a late model F 450-550 chassis, in the long run it would be cheaper and safer than trying to patch together and old truck to do a new truck job. I have several friends that have put a vintage COE body onto a late model RV chassis to haul their custom car to car shows. If you are cleaver about how and what you build it can be licensed as a '41 Ford saving a bunch of money on license's/tags.
I did that with a '64 pickup body on a '97 chassis.