[Zeroman]

Since these trucks were manufactured at multiple locations from different machinery there are tons of slight differences between one cab and the next.

The "flush fit" windshields typically require a bit of metal work on the cab around the windshield to make it fit properly.

The pinch weld in some cases has to be extended to allow for proper sealing to the glass by way of a pinch weld gasket. The glass is bonded to the gasket using a urethane glue.

The pinch weld and gasket are "hidden" by a black band of material called frit. The frit is usually an epoxy based paint which is baked onto the glass to provide an etched surface that allows adhesive to bond to the glass. Look at any current vehicle, and you will see frit around each sealed window surface.

I think the flush fit windshields look good on customized trucks, but for me, the juice was not worth the squeeze.

On the inside the pinch weld gasket looks pretty much like a regular windshield gasket. Here's a pic of my flush fit rear window from the inside. The pinch weld gasket is just above the seat back, the frit is between the gasket and the C/10 Club decal.