My '89 has two screws under the windshield gasket at the corners of the cowl cover. You'll see the slots if you can pull the cover off. Put a little grease on them when you tighten them back up. If they stay loose, they can squeak and make you think your cab cowl is cracked. The warning sign for me that this bushing was toast was that my wipers weren't parking consistently and they had lots of slop. With them off and parked, I could lift an arm away from the glas and move it up and down 5 to 6 inches. It's much tighter now.