1968 Dodge dart window issue.

Hello i recently have been trying to get my rear right quarter window out but it seems the bolt has snapped. This car is a restoration build with my dad and I and i checked the manual but it has not been much help. The window moves back and forth when all the way up, and i don't know if i need a special bolt to replace it or how to get it out with this broken bolt. Any help will be appreciated.
Thank You!

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