It seems this thread is somewhat out of date with my truck progress.
A couple years ago I did get the freshly powder coated single 19.5" wheels back and installed with slightly used Goodyear 8R19.5 tires.
The right front kingpin appeared to be suddenly become quite sloppy causing wheel shimmy and reduced interest in driving it like it is. Not sure what happened as the king pin and bushings seemed quite snug during previous brake and wheel services. Perhaps it had old crusty grease in there taking up the sloop that I eventually flushed out with fresh grease?
Also the front right brake had one shoe down to the rivets. As a temporary measure I removed the one rivet it was about to contact and reversed the two shoes on that side. That allowed me to drive it a few miles locally to an event a couple years ago. I haven't driven it much now other than in and out of the garage occasionally and to the dumpster around the corner.
I did find some NOS front brake shoes and I could replace king pins and bushings... However long term plans call for a front axle with disc brakes, which I have been gathering parts and doing research for for probably 10-12 years. So I'm more eager to get that sorted out than to replace and repair the original brakes/axle.
To that end I have recently modified a 2 ton axle beam to more or less fit the 1 ton truck and allow using spindles and large disc brakes from a GM P-30 (bread truck and similar). More to come on that as I get it assembled.
Two pictures attached. One from a show probably 2 and a half years ago and I can't remember now if I drove it or hauled it or if that was before or after the kingpin slop issue arose. Second picture of what the truck does these days, sits in the garage.