The windshield and rear glass on these cars usually use a seal with a lock strip. I once hired a glass company to install the glass in my Cuda. I asked him if he was going use sealer. His answer was there is no need. When I saw how easy it is to remove and install glass in this type of car, I'll never hire anyone again. I always do it myself without help and I don't use any messy sealer. I have never had a leak. If your're using an old seal, it might be a good idea.
