[factorystock]

Sales brochures have no mention of any optional hubs, however the GMC silver book shows the Warn hubs as being available in '64. No mention of Spicer type in book. Found a photo of the Warn type, not sure if it's a '64 or '65 pickup. Again, it would have been more economically feasible to have just one large cut out hubcap for all applications, which is why I surprised the small hole cap even existed.