Just did mine today. First you need to find a non hardening, nonsetting sealer then place the gasket all around the pinch weld top and sides. Set the bottom of the gasket on the dash out of the way and run a bead of sealer along the bottom just below the dash and about 2 inches up the sides. Now set the bottom of the gasket down and hook the three tabs into the channel of the rubber. Now it gets hard,set the bottom of the glass as deep into the bottom as possible, you will need a couple of stiff plastic sticks to work the gasket around the glass and dont be afraid to pound the glass to help set it. Work your way around to the top until the whole glass is in the channel.If your still willing to go on, you now have to overlap the locking groove which is just as hard as setting the glass. I helped an old timer do it and we decided to do the trim tomorrow