1963-73? Oil Filler Cap - New. This Oil Cap is an original and still in the Ford Motorcraft Box. It has a part number of C3AZ-6766-E which I believe is from a large vehicle like a Torino, etc but should fit other applications also. The sides of these caps are not smooth chrome all the way down, they are finished differently on the sides than on the top. If you are looking for a New Oil Cap, then this is for you!!!!