1972 Demon Build
That all looks nice! The grill was a pain I'm sure, but it will pay off well after you get the car all back together. I dug thru my stash to see if I could find a vent door latch for you. Nuthin, nada, zip! The only heater box I have is one out of a later A body, and they must have changed them in 73-74? It's an AC box, and doesn't even have a vent on the passenger side.