As all you Mopar guys, and lot of car guys know, the 71-72 Demon was the same Duster/Dart with different tail lights, and they are very distinctive vertical stamped in slots in the tail panel. Spotted simply even at a distance, as once you've recognized the body shape, it's going to have one of 3 tail light shapes
Anyway, I got a laugh from seeing this Demon in the junkyard in this scene, and figuring out that the people making this show happen had got a laugh from sneaking in a demon into season 4