Fender mounted turn signals 1971 Dart/Demon

Also be on the lookout for the weird (don't remember the name) "mile master" or some such. This was a stupid option that was supposed to help you "get fuel mileage." It was a harness with vacuum switch that connected to the left front fender indicator. When you used too much throttle, the vacuum switch turned on the left fender indicator. A couple guys "on here" spent hours troubleshooting a trouble that wasn't there.
I think you’re referring to the Fuel Pacer system which was an option on the ‘75/76 A bodies. It’s fender tag code L73 but that’s also the same code used in ‘71/73 for the fasten seat belt reminder light?