I got all the window glass down from the attic and removed the metal channels from the bottom of each piece of door glass. I noticed that a majority of the glass had been replaced at one time or another. The replacement glass was generally thinner than the original. The next step is to visit a couple of glass shops and see if they can make replacements from safety glass.
I also started bead-blasting the windshield frame, and I installed a welting strip that runs around the front of the cowl, to provide cushioning for the rear edge for the hood.