How do I seal my windshield on 67 Barracuda?

Ok, I tripped on your thread, I'll give the best advice for I installed glass for 19-20 years, I may be able to help.. If your plans to wash your car, get caught in the rain, then you will need to seal it.. A lot of people invest so much money they will never get it wet...that being said, most chrysler windshields are lock strip type, normally the windshield will be installed by rope in,or slowly work the windshield into the gasket already attached to the body..after you have installed the windshield the bet way to seal it is by liquid butyl..You want to use a 3m liquid butyl caulk tube.. Start with masking the body next to the gasket with easy removal tape to prevent mess..Make sure you have a non damaging solvent like automotive urethane remover for clean up...Once you lay your tape down, you are ready to seal your windshield.. You want room temperature liquid butyl caulk so it flows easier and not difficult to push out of caulk gun..Also a hook tool of some kind or a plastic paddle preferred to protect body.. Cut the end of caulk tube to a 3/16 or 1/4 inch diameter hole.. Start from top center pull the gasket back with your left hand using your hook tool or plastic paddle and slowly caulk with your right..just enough to allow liquid to flow and settle into gap. Do not fill it up or will make a huge mess when you place the locking strip in..only go 3/4 way down your A pillar, allowing room so liquid will gravity flow down to the lower corner..Please avoid using any silicone between gasket and body..silicone promotes rust and in a few years will see rot..You can use silicone between glass and gasket, that's OK.. Hope I was able to help you along..liquid butyl will never get hard so you can remove your windshield again..Also check before removal to make sure if both parts are still available, sometimes glass can be cheaper than a gasket or visa versa you may have to sacrifice one part to save another..free advise good luck and have fun...Sean