I have a 1971 Caravel
with rotten window gaskets. I've got the D-type gasket material and adhesive.
I've been given instructions on how to get the opening windows out, and I gather that opening them past 90 degrees is going to allow the separation of two interleaveded channels.
What I can't figure out is how to open the windows past 90 degrees. The bent metal rods that slide in plastic channels to open the windows and hold them in open positions will not permit the windows to open more than say 50 degrees. There are some sort of clips holding these rods on (on the outside), but they aren't ordinary C-clips. More like washers with a break in the circle that's less than 1/16". They're thick enough to be pretty rigid and have resisted attempts to get them to budge.
The alternate solution, taking off the knobs and pushing the rods through from the inside doesn't seem to be a geometric possibility . . . at least not without breaking the plastic channels.
(If this isn't clear, I'll try to get some photos tomorrow).