[MrMotion]

I have the 1969 Hi-peperformance Cars Mag and the Motion catologue ad shows these valve covers with their Ram air induction system.In the Martyn L. Schorr book " Chevrolet the Performance Years" pages 55-62, SS-427 emblems on Chrome valve covers are standard equipment.I believe the finned covers were offered as optional install or over the counter for dress up or conversions and through catologue sales.