Check this link for info:
http://www.stovebolt.com/bboard/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=4&t=000261&p=

I finally stayed with my split rims. I like the look of the 3/4 ton hubcaps and a local tire shop that handles big trucks had no hassles with my split rims.
Murph
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'49 GMC 3/4