what happened to Swingers in 1973?

I knew I could get some help from you guys. Thanks for all the info. And now I know why my 73 Swinger is not listed sometimes on sites that cover "muscle" cars. I suppose, to the purist, the last Dart coupe with muscle was in 1970. I even saw a 73 Swinger on this site that had been converted to a 1970. Well, I guess I am not a purist because my 318 Dart looks very cool and is a whole heck of a lot faster than my Subaru!