Interesting little tidbit here.

I just got off the phone of a very reputable local paint supply house. They were having problems locating the correct mixing code for a base coat/ clear coat Solar Red. They called PPG and had them utilize their internal color library. According to PPG, their has not been a proper formula prepared for Solar Red in a BC/CC. It is available in all of the period paints from the time, but not modern BC/CC. They were sending the information down to their color matching lab this morning to have a proper formula made up. It turns out, the Matador Red is close, but not exact match to the Solar Red.

It will be interesting to see the formula differance.