Just FYI: Here are some links to vintage mustang commercials (including the GT/CS commercial)...
http://www.muscularmustangs.com/database/mustangcommercials.php
http://www.gt350h.com/
http://video.google.com/videoplay?docid=-2555103110563366337&q=mustang+commercial
http://www.muscularmustangs.com/database/mustangcommercials.php
http://www.gt350h.com/
http://video.google.com/videoplay?docid=-2555103110563366337&q=mustang+commercial