A thread over on Yotatech has some options:
- http://www.yotatech.com/f116/eliminating-metal-windshield-trim-aka-rust-maker-107858/

Including what I did:
- http://www.4crawler.com/4x4/CheapTricks/WindshieldTrim/index.html

On the '84 and later trucks, the windshield is glued into the frame and the trim is merely cosmetic, just some metal pieces that snap into the gap between the glass and body.