I'll add my 2¢ - the 8-lug wheels are really common. 8 on 6.5" pattern, and GM used them all the way through the 2000s, at least. There are 19.5" one-piece wheels out there that have the hubcap clips, but I haven't had any success finding any. I'm restoring the stock 17 x 5 Firestone type AR wheels on my '50 - it's one of the safer designs, and since mine are original to the truck...

Anyway, you should be able to find what you need. 16, 17, 18, 19.5... all common and available!

If a 'truck' is only used to haul butts to the mall, then it's not a truck - it's a car with a roadster trunk.

Old, rusty and ugly - might be me or my fleet. You decide!