Winshield Leaking

Thanks for the advice 64dart and a340. I'll check out those links as well. Yeah, yesterday I had my dad pour water from a water bottle down the windshield while I was in the car looking for leaks. We started from the bottom and worked our way up along the corner. It seemed to leak about 3 inches up from the lower driver's side corner. Inside the car, the water was dripping down the kick panel wall (took the panel off) near the door, as well as the lower corner of the dash.

I guess I could just clean out the excess sealant gunk, then reapply to hopefully seal the leak, but who knows if that will work....I'm willing to try that first before popping the entire windshield.

Now, these local shops today, do they know what they are doing with old cars? I know modern windshields are a bit different than what I have. Just worried about some flunky shop guessing on the right way to install a windshield. Thoughts? Once again, I appreciate the input.