In that era it was popular to have chromed u-channels for the glass, with felt inserts. If so. pull the insert out and look for screws or pop rivets holding the channel in place. Once those are removed you can get the glass in from the bottom.

Call the auto-glass store and make an appointment. It is worth every penny to have them do the labor, believe me!

Which window driver front? passenger rear? manual or power?

take it to the glass shop, if you don't know that we might need to know which piece, which body, etc, you need a professional ...get a Fisher Body Manual if you're dead set on DIY

http://www.amazon.com/dp/B00FA5RA7Q?tag=...