No difference between a Valiant and a Barracuda (or Dart for that matter) in a given year. There were both sway bar and non-sway bar versions though. With aftermarket bars, there is usually a kit to install their bar on cars without the sway bar tab. Some use the lower shock bolt where you add a bracket. Some require a weld-on tab. And still others make one for a car with the factory tabs. Check their catalog or give them a call to get the correct one for your application.