The first step was to strip the doors of the vent window assembly and factory rubbers. In our case, the doors were new, so we just installed the regulators, handles, and locks. Ben started the install by opening up the channel area of the door where the vent window normally resides. This area is a little too narrow for the new felt to reside, but after opening it to about 1-inch wide the felt fit properly.
1973 Chevy C10 Buildup - The Pickup Fix-Up Tour