I recently saw a posting in another topic with a member signature indicating that they have a 79 Z with"non- functioning side vents". I had seen this referenced in a test drive in an old Popular Hot Roding magazine back in the day, but thought that it was a typo. I have a 79 that I have had since September 79, built June 79, and the side vents are open and functioning from the factory. Are there functioning and non-functioning side vents? Mine is a Norwood build, so I wonder if the vents are open or closed depending on build date and/ or where it was produced?