One thing to keep in mind here about GM and their trucks in that era is that they weren't those most notorious bastions of consistency on a plant by plant basis.
So what is truly original can be disputed forever in specific areas of build methods or parts. If they had to substitute stuff or improvise methods and parts on line to keep things movin'...they would.
So what might have been painted a certain color at one plant may not have been painted at all....or the same color at another plant.
All good
Coley
