Moulding codes started with M, IE, M88 - Tail panel moulding.
Vinyl codes started with V.
I looked at codes from 1970 - 1980 after seeing the other thread and there is NO mention of a body side molding code for M88 in those years.
Besides, billboards are over rated, soon every 1971 clone and hotrod car will have those AND a shaker hood.
The Nats in 2015 is going to be awfully boring, by then all cudas may look the same.
Barry