Out goes GM’s F-Body Pontiac in comes Ford’s retro-penned Mustang. Our Jalopnik pals have the inside word that the car you’re seeing in this picture, a Shelby GT500 KR (the red light is photoshoped though) is the actual vehicle that will play the role of K.I.T.T. in NBC’s upcoming Knight Rider TV series. The show is expected to air on TV next fall. PS: What do you think about NBC’s decision to