67 headliner

I would not pull the glass out just to put a new headliner. I just went through the process. My glass was already out. Installed the headliner glued the front and rear at the pinch weld. By the time I got the glass installed it all came loose anyway and redid it after I got the glass in. Not to mention you will probably have to get new seals if they are old. And take a chance of breaking your glass. They sell small plastic dull edge tools you can push the liner in under the seal. Just my experience.