I don't know crap about cougars (cars & women), but I was in a junk yard in the 80s & there was a 68 S code 390 there, sans eng. & trans, that had a hole in the hood with a trim ring around the hole much like a shaker has. did they make anything like that or did someone home brew it? It always bugged me I didn't scarf up that hood. The ring had all the right contours for the hood.