Originally Posted by CORPO
...what makes you question if they were off a newer truck?...
Just a guess from the picture and what I've seen on other trucks, no concrete reason and no way to explain it..

Originally Posted by truckdog
The first record I show of an AR mount is 1949. ...There's also an old style AR and a new style AR shown in a 1953 K-H catalog. Yours look old style.
There's your real answer, about 49-52 or so.

What's the pilot diameter on your 36 hubs?
The new wheels you found are for 4.75" hubs.
Some of the really old Chevy trucks with the same bolt pattern have even smaller hubs and the center hole in the wheel is smaller to match.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-