Vintage day 2 Valve Covers - M/T & Edelbrock

[elcamino72]

Can anyone date these valve covers? I purchased these two sets. The first is a set of Edelbrock curved script cast aluminum covers with knockouts for the PCV and the oil fill. The other set is M/T tall cast aluminum valve covers for a BBC without the 427 cast in the PCV knockout area. The underside of the M/T valve covers say 396-427, Made in Japan and have part number 3278396. Also what vintage are the Offy breathers?





I wet sanded and polished both sets by hand. The Edelbrock's found their way onto my 1972 El Camino, the Mickey Thompson's will find their way onto my 402cu big block in my '59 Apache!

Thanks guys
Bryan Shook