If you want to see something really cool, I work with a guy who re-did his '71 Mustang. He adapted the '68 Shelby tailights and a '69/'70 Shelby rear Exhaust set-up to it with the '68 fiberglass panel in front of the regular panel. I could not believe how awesome it looked. Definately a mod that has been overlooked. It gave the meanest look to the rear end of a '71-'73 that I have ever seen. More people should try it...and it will definately start a trend.. I guarantee you. Much better than the boring '71-'73 trapazoidal tailights.... I think the stock '71-'73 Mach 1 rear end looks cool though with the honeycomb tailight panel if you are going all stock.