BB GM Valve Cover I.D.
 

I have had these valve covers for almost 34 years-they were on my chevelle when I first bought it-I took them off then and replaced with a set of original 70 chevelle ones I had-the previous owner had a bunch of 1969 vehicles so I think they may be from one of them-just looking for what they may be off of and a value.Thanks in advance!!!
Keep on Cruising!!!
Dave

Your valve covers are for a 1967 Chevelle L78, unfortunately, you are missing both the rear top plug wire stands & I do see a few dents, all of this affects the value.