I'll update this thread. Thanks to the help of NDT, we have arranged the purchase of 5 of his tires that match the 2 I have. So the 817 gets a full set of new old stock NDCC 14.00 tires to replace the 11.00's.
I have a tractor to snatch wheels and hope to find 24 bolt to replace them. Since the truck was drug with the brakes locked, the back four tires flat spotted and need replaced anyway.
I tried a couple of cleaners on the NOS tires above as there seems to be an original preservative that holds dirt now. Water and soap were first followed by other cleaners and ultimately gasoline (lightly on towel). That got them clean but seemed too aggressive. I had a contaminated brown axle grease that I tried on a small area. It works great! The dirt is carried away in the excess grease, that is wiped off completely. It leaves the best "new look" (which of course will fade) that I have found. Putting it on, brushing it in and wiping it off is a lot of work!
Comments on using old grease on tires?