All I can say is re-check the FSM. I can only comment on a b-body convertible & there's not much to it. The windshield (on mine) isn't the same as a hardtop (taller). There's the basic windshield seal, two very thin foam rubber gaskets with adhesive on one side that go up the A-pillars on the outside under the chrome (anti-rattle?) and that's it. You should be able to figure out where each piece of windshield trim goes by laying it out on the car like a puzzle and see what fits where.