The previous owner installed a radio in what looks like where an A/C vent was in the dash. Is that what happened here? Can someone post a pic if that is what this is? If not a vent, any idea how to fill it in?
Search old salvage yards for a good one from a Coronet. Maybe someone is parting one out. Not sure if a Satellite/Belvedere one would work as the radio and AC vents are flip flopped in location and is longer.