I'll have to try to get a hold of Morrison Brothers to see if they have any historical docs I might be able to peruse. I've got word out to a buddie to scare up an old silver book to see what it says. Also gonna hit up the local ATHS guys when I get a chance or go hit their library.
Saturday I swapped some better tires over to the front to make it look a little less "inoperable" as the codes guys say. I noticed the front drums are stuck so when I get time I'll spray them down hook it to one of the other trucks and do the old tug and dodge to see if I can break them loose.

Pics with the fronts off and my new Big Bolt Jack.
Towmotor Big Bolt Jack
Front wheels off

Mongo


Mongo's Garage
Vintage GM Truck's & Parts
https://mongosgarage.com