C9ZE-6583-G Cast aluminum valve cover with. Correct on 1969-1970 Mercury Cougar Eliminator and Ford Mustang with Boss 302 engine. This is the finned aluminum valve cover. Ford master part number is C9ZZ-6582-C.
*Note - Most, if not all 1969 Boss engines came with a chromed steel valve cover. Research did not turn a part number for that valve cover. Likely it is a chromed 351C valve cover. If you have the part number for the stamped steel chrome Boss 302 valve cover please share.