I read somewhere about the 69 Swinger being offered in a special red only available on the Swinger model. I only know of R4 and R6 was there something else?
Looking on both sides of 69, there are listed for a 68 color that may have flowed over to the 69 yr was paint code PP1=Matador Red. In 70 colors which may have been used on late model 69's they show paint code E5=Rally Red. You are right on the 69 colors. Only two shown in my books. The two you listed. Good luck.
Small Block