Thank you to all who have helped. At least now I know that the car has a 68/69 windshield gasket and trim. 64dart170 - your thread on windshield replacement was very well done, and very helpful.
I guess that I will try sealing the windshield with some butyl sealer first. If that fails, I'll have a glass service remove, seal, and reinstall the glass. I assume that I should seal the glass into the gasket, as well as sealing the gasket to the fence - is that correct?
Thanks again,
BlindSquirrel