Sorry for the "good luck" then just leaving you hang like that. I assumed others would chime in with their thoughts. I did use reproduction moldings on a Cuda project. They are not bad. It takes some effort to get them tight fitting. Start in the upper center and work your way down in each direction. Spring clamps help a lot. Plan on drilling new holes in your quarters/fenders too. There are a lot of guys on here that hate the reproductions, and I understand why.......... they certainly and not perfect. It depends on your goals for the car. If you plan on local cruises/car shows, you will do fine with them. If your looking for national OEM exposure, they would not be good enough for you. Just my

Also, this is based on a cuda............ I assume you are asking about the challenger in your sig?

Again, good luck........ Hope I helped some?