I posted about a year ago about my experience with Stockton Wheels. My 2 ton 1950 COE had 8.25x20 tires on the true widow maker wheels (Firestone RH5). From my research this is the one type of split rim you don't want to mess with. The others, if in good condition, can be used, if handled properly. Stockton took 22.5 radial rims and fabricated new centers with the proper hub diameter and bolt pattern. With 9R22.5 tires, the diameter is exactly the same as the old bias ply. It cost me $275 per wheel to have them fabricated and then you have to add the cost of the new tire. Kind of pricey, but I will have (when the truck is finished) a radial ride that is safe. The wheels have Budd style handholds and look period (OK, I know, not to all you experts) These wheels fit just fine over those big drums, despite the center recess. Call the owner, he knows what you need. I recall his name is Frank.
Kent