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For future reference, here is the part number history for the chrome slant six valve covers from old Direct Connection and Mopar Performance catalogs.
P3690742 fits 1960 - 1980. First appeared in the 1975 catalog and continued thru 1994.
P4120930 fits 1981 - 1987. First appeared in the 1982 catalog and continued thru 1989.
In 1990 Chrysler superseded P4120930 to P4529063 which last appeared in the 1997 catalog.

Silver lining in the cloud, Thanks

Good Info.....


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