Mine are 1964
windows, so not sure if this is any help.
There are a couple things holding the window in the frame. It helps to have 2 people but not too bad by your self.
1) On the outside of the window frame, center, top, there should be a very small Philips head screw. Removing that will allow the window to slide sideways out of it's track/hinge. Caution, see step 3!
2) On each side of the frame are nylon spacers that cover a slot opening again with a very small philips head scew. Remove them both. This allows you to remove the nylon slides that are on the ends of the lift arms.
3) Before you remove the window. Remember step 1 and that very small Philips head screw? Be Careful, It screws into a very small nylon piece that will fall out and get lost when you remove the window from the track. Should this happen, don't freak out. just use a small piece of electrical wire 14g to replace it when you reinstall the window.
3.1)Now lift the window to about 90 degrees and slide left or right (Look for the small nylon piece half way) until it is free of the track/hinge.
4) reverse process to reinstall window.
Hopefully this is helpful.