Below is a link to photos of the two types of 17" wheels we mounted on our 3/4 ton GMC in the 1950's and 1960's.
https://photos.app.goo.gl/on1LboE8MEy2b5Ld7They were both 3 piece and used a sort of snap ring to lock the removable ring. In my opinion they were the safest multi piece wheels ever made. They are simple to change. We lubricated them well with either Rublyde or just soapy water. We used a duck bill hammer to knock the bead down to where the lock ring completely exposed the the snap ring. The snap ring can then easily be removed with a large screw driver. I have a couple of tire changers at my shop. One is for passenger tires and the other for large truck tires. I am sure either one of them could be used to knock the bead down. I am 78 years old, but I would not hesitate to change one of them using a duck bill hammer. However, I rally don't want to in our 100℉ heat.
17" were standard on one tons. I think they were an option on 3/4 tons. We found used wheels in wrecking yards back in those days and replaced 15" with 17". 17" wheels were hard to find back then. Not many 3/4 tons came from the factory with 17" and one tons could be either 17"single or 18" dual. I wouldn't know where to begin looking
The quick fix is a Dexsar conventional trailer wheel. They use 16" tires that are still available.
https://www.etrailer.com/Trailer-Tires-and-Wheels/Dexstar/AM20766.htmlThey are the same design that Ford used on their pickups for many years. Ford will work in a GM, but not visa versa. The bolt pattern is the same, but Ford used a bigger hub. They are stud piloted so it really doesn't really make any difference. GM hubcap clips can be attached to the Ford/Dexstar wheels to attach GM hubcaps.
