That shaft that attaches to the vent frame is stepped (smaller diameter) to fit in the frame which is peened over to hold it in place. The hole has the two flats shown in your third picture so it won't rotate. The other end of it has a cut across it to limit the travel of the latch. Here's a picture.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
