Congrats on your new (to you) Skyliner. Sounds like your car will be nice to drive around in Daytona Beach. I have not had the pleasure of getting into the rear quarter window mechanism (hopefully will not ever need to), but I did find a drawing of the mechanism in my 1957 Ford manual (I am sure that Ford did not change the design between 57 and 59 on the window mechanisms, particularly for the Skyliners). I'm not sure which pin you are referring to, but if it is the pivot pin then it is shown in an exploded view on this image. It looks like that pin is held in place with a setscrew and that would be near impossible to reinstall with the window assembly in place. Unfortunately there are no written instructions for disassembly that I could find, but it looks like you might need to remove the entire window assembly from the body in order to reinstall the pin (if that is the pin that is out of place). Good luck on your project and post pics of your car if you have a chance.
Good Luck,
Dave
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