I did a little more archeology on the car tonight now that I'm getting into some of the trim pcs. The 4 corner marker lights are shown in the pic below. The two on the bottom are the rears, the two on the top are the fronts. The fronts have the "ice blue" overspray from the 1970 paint job. The rears were covered in trunk spatter from when the car got painted black in 1978. I started to clean the trunk spatter off and "lo and behold" red paint!??
I called the guy that painted the car back in 1970 to ask if the rear tail panel was painted red back then. He didn't think so but wasn't sure. As I'm talking to him, I'm looking at some of the photos the 2nd owner's son gave me. I had never noticed it before, but there it was, one pic showed a red tail panel! That pic also shows the trunk lid sans spoiler and where the paint line was between the blue and white. In the conversation, the painter told me that he might still have the old paint cans in his shop - wouldn't that be cool! He said the three colors he used were "ice blue pearl metallic, silver mist pearl white, and candy apple red.