Windshield and rear glass question

Wonder if the rear window on my 66' can be installed with out a gasket? LOL!
Getting ready for paint and then headliner and then glass goes back in.... sweating the rear window on that car.
Getting the old one out was a piece of cake- or razor blade. New gasket and huge window. even my glass guy asked me to find someone older and more experienced.
That scared me. He's 55.