What is your scheduled build date of your car? If it's an early '72, it could have '71 parts on it. My '72 Challenger has a '71 Rallye gauge cluster from the factory, possible other stuff too like the trunk lid. My SBD is 8/17/71. August was the first month of the '72 model year so if you have an SBD in August it could be a '71 hood if it's original to the car.