Here's some more details on these 19.5 x 5.25 - 7/16" offset SRW 8 lug one piece rims from the Chevrolet side.
During a GMPartswiki search of "2339612" (the wheel Bill ID'd above from the GMC parts book), GM shows it being replaced by "3724686" effective 07/67. Searching the GM# 3724686, shows it is listed as one option being used on:
Chevrolet 1956-59 3/4 - 1 ton single wheel
Chevrolet 1960-61 Series 20 (3/4 ton) (4/WD & D-D) *
Chevrolet 1962-63 Series 30 (1 ton) (D-D)*
* D-D = Dubl-Duti Panel/Delivery Van
Going on in later year Chevy Master Parts Books, the "3724686" was later (1973) listed as "use 2339612", also dated effective 07/67. I think that's just basically confirming that the part numbers/wheels are interchangeable.
Both numbers were eventually washed out of GM listings, with the latest "3724686" I found dated 1990.
Anyhow, now that you have lots of details, it sound like it's maybe time to go post ads in our
Truck Parts Wanted forum. Matt and Kon, please do your own ads as you're each in very different parts of the continent and we wouldn't want you competing over the same parts.
