the gasket will work from 63-66 but there is a slight difference in one edge(inside only) that will show some metal (I think it's on the top edge, it'd been about 8 years since I did it so....) I used some good black rubber weather tape put right next to the seal and installed the inside trim on my old 66 dart. I have not done the curent one yet but do have the gasket out and can check it with pictures if needed.