To R&R a windshield without removing the dash, one can cut the lower flange of the lower w/s molding at each hole location. Remove a piece of the lower molding, width slightly larger than the diameter of the hole for the attaching bolts, at each hole location. You will end up the lower molding with a series of long cuts at each hole location. That way, one can start the bolts holding the dash in place and merely slide the w/s assembly into position.