Have we confirmed you actually have the "Widowmaker" Firestone RH-5 rims? There are lots of multi piece rims out there that are still serviceable. Post a picture of your rims (outer rear will show us what you have).
I'll be using 1949 era 2-piece 20" rims on my '56 4400 project. They are the same bolt pattern as the RH-5's that are on the truck but they had a 4.75" center hole. So I had a friend turn the hole to 5.25" so they fit my hubs. The only reason I'm not using 22.5" rims is because I can't find heavy lug 8.25x22.5 Mud/Snow tires, but I can find them in 20".
Mike B
