I pulled the 8 bolts and center bolt off the end of my 1/2 ton hub. I now have a better understanding of what I need to search for. Mine is a 16 spline, 3 5/8" outside diameter hub with eight mounting bolts. Not much out there other than a couple of them being rebuilt on youtube.
Anyways, like my search for a 1957 GMC Operator's Manual (comic book style) continues, so will my search for these obsolete hubs.

1957 GMC 100 * Line Built Napco * Pontiac 347 * 89" Stepside * Purchased new by Grandfather from my Father's dealership in 1957.
1967 Camaro RS Convertible
1968 AMC Rebel
1966 Ford F100 Crown Vic swap
1968 Mercury Cougar Barn Find