Here is a photo of the bumpers installed.
You can get them at Jim Carter Truck Parts
[/img]1936-1946 Windshield Bumpers Chevrolet and GMC Pickup and Big Truck
These fit on either side of the cowl where the stainless windshield crank tongue protrudes. This prevents metal to metal contact between the lower windshield frame and cowl. Made of rubber surrounding an inserted metal washer with a hole for screw to attach it to cowl. You should still have two very small holes for the fasteners in the cowl where these bumpers were originally attached.