Tony292,
See this thread for a discussion of what I had done for my '50 Chevy COE model 5700. In short, Accuride wheels, 22.5 x 6.75 had the hubs cut out and replaced with a plate with the proper hub hole and bolt pattern for my truck. I mounted 9R22.5 tires which are a replacement for 8.25 x 20 tires, so there is no change in gearing or speedometer accuracy. The firm mentioned in the post no longer does this kind of work, so stick with the one you have found.

https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/457491/1.html

Kent


1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix