Here is a good website for information when it comes to E-body Cudas and Challengers ( www.cuda-challenger.com ).. Usually the question you want to ask has been asked there..

Have you decoded your vin? Do you have your fender tags? If so have you decoded them? If not just google mopar vin code decoder and you will be pleased with what you find.

Sorry to anyone if i broke a forum rule by posting the link, i was just trying to help someone out.