Installing various parts, and all the under dash stuff. Note the Heater Box Factory OK inspection tag. A little over 10 years ago, I was able to speak with Frank, who happened to be one of the Chrysler quality control inspectors back when these cars were built. His job every day was to inspect heater boxes. They came in on pallets, and he was supposed to inspect a certain percent of the boxes on every pallet. He had a pile of these green tags, and a ball point pen to write on them. He didn't always sign the tag. If the box got a tag, that means it was checked. Only heater boxes that were inspected received the green tag, so not every car has one of these.
