Welcome aboard the SBP Allen.
The setup is to use the hubs, drums and backing plate assemblys from a pre '55 passenger car. You have to drill two holes in the backing plate to match the bottom holes in the pickup spindle and make a couple of spacers to go between the spindle and the backing plate. The whole job takes just a few hours.
I came across the ones I put on my '49 almost 30 years ago while digging around in my shop the other day. I upgraded to Camaro disks after an incident involving a steep hill, a stop sign at the bottom and a load of firewood.
