I was just at our local junk yard and theres a 55-57 GMC 350 series with 2 speed rear end thats running single piece 20" or bigger 6 lug Budd wheels. Not that it would help you unless you felt like going for a drive...
Jeff
If they are on a 55,6or7 they are 22.5s 20" are tube type and 22.5" are tubeless and all one piece wheels are tubeless
