Have you ever seen any Dart, Valiant, Demon or Duster with a rear window defroster?

Bennoel 10 said
I have a 69 340 swinger that came factory equipped with rear defogger/deicer. It's a two speed blower fan style. I'll try and post a pic of the switch, also IIRC it says "rear air" .

Now the more think about it maybe it says "rear defroster". Now I really need to look. Lol