ok i don't under stand this the pic shows the front glass fitting into the weather strip like a L shap mine don't do that maybe its backwards don't know it on a 65 mustang
anyway i can't get to load is ther a way i can paste a pic
The front window just overlaps the quarterglass weatherstripping. When the door is closed you see only a thin stripp of rubber between the front and rear glass, when you open the door you see the weatherstrip (3/4" or so) going forward from the rear glass... The rear weatherstripping has a tiny channel for the front glass, but it not really obvious.