If you read the restoration articles in Hemmings or other publications, you've seen cars where the restorers went through great lengths to replicate various markings that were put on the car throughout the assembly process, all in the name of preserving history. Many muscle area cars had various letters scrawled across their firewalls, stripes painted on the drive shafts and springs, supplier stamps painted on the fuel tanks, so on and so forth. While not for everybody, some restoration enthusiasts eat this kind of information up. Probably the most notable example of this I can think of for our cars is the red spray paint that has been documented on the rear brakes of the '86 and '87 GLHS cars.
(photograph of '86 GLHS #326, courtesy of 86Shelby)
While working on my own '87 GLHS, in addition to the red spray, I also discovered two other assembly line markings: a green dot on each brake drum adjacent to the balancing weights, and a blue dot on the top of each backing plate above the bleeder screws.
So, in the interest of preserving history and having this information available to anyone who may be attempting a 100% authentic restoration of a turbo Mopar, who has discovered similar markings throughout their cars and who knows what they all mean?