I was just getting my list of parts that I need to order tommorrow ready and ran across a couple of questions: How many "Vent Handle Spring Washers" are needed to both vent windows? How many "Vent Handle Roll Pins" are needed to do both vent windows?, How many "Vent Window Lower Pivot Springs" are needed to do both vent windows?, How many "Window Stop Bumpers" are needed to do both windows?, Is Chevy Duty's Windshield glass priced for both sides of a two piece windshield or just one? The truck the parts are going on is a 52 3100. Any help would be greatly appreciated.