The 1967 Shelby Mustang used '67 Cougar tail lights mounted in a special fiberglass back panel. This was the first year for the rear spoiler. Note the Shelby Mustang emblem on the left of the spoiler. The 67 also had a flip down gas cap very similar to the '68 with SHELBY COBRA GT350 or GT500 on it. This car belongs to Steve Blackett.
 

This is the rear end of Kenny's 67 GT 500. Without the stripes, you can see the rear end a little better. Note the tail lights have a chrome frame but unlike the 68 there are no chrome on the red lens. Also note the single tube exhaust. Click on the picture for a larger image.
This picture is of Eleanor from the Movie "Gone in 60 Seconds". Although the movie car was not a real Shelby Mustang, its seems appropriate to show the car here.