I don't remember where I heard it, but CUCV's and civilian blazers weren't produced on the same line at the same time. GM had a special inspector waiting to make sure each CUCV was correct because they were getting a premium price for each. They were supposedly made in batches, probably by the contract. Now of course I wasn't there, so what I'm saying shouldn't be taken as fact, but it has always made sense to me because it was a special build, with special parts, and could explain the paint differences. I'm curious how the different branches of the military received their vehicles. If the Air Force for example had their trucks directly delivered from GM, they went to a paint facility for changes or went to the base from a central holding area where they were officially accepted and got their numbers.
People have told me that the Air Force procured more of their vehicles and parts outside of regular military channels than the other service branches, but the Navy did it too, as they all did.