[Mark_C]

The tag was obviously sprayed white after the firewall blackout was applied, which means it was either painted as it left the Fisher Paint shop, or at some later point in the assembly process. Not every car had their tag painted so it can't be for better visibility, unless some tags were magically easier to read than others. It may even have been done by GM as it came thru the wall from Fisher to flag the car for some reason. No one really looked at the tag, since there was paperwork similar to GMs body broadcast sheet hanging off the firewall with Fishers version of equipment codes on it