Just finished a complete resto on a 66 122 2 dr. Removed w/s. clean clean clean the glass edges. get a new seal. Make sure body is cleaned of all crustey sealent . factory and aftermarket. take it down to metal.. Paint car. put glass in new seal. seam to bottom. Two people needed. Use the string pull method. one person inside one outside applying light pressure. Inside man pulls string and glass and rubber come home. If all is clean. dont seal the rubber with gup. wait a while for the seal and glass to bed in. let the sun shine. It may not need any sealent. A small leak is accepactable. This 66 dont leak. For now.