Probably more trouble than it's worth, but I will point to this thread...
Has anyone ever converted manual windows to power windows? Im 6 foot five and I tend to keep smacking my leg when I roll the window up or down. Just wondering if anyone has done the upgrade and knew of any prepackaged kits to get all the required parts at once. I'm also thinking of converting to...
www.stangnet.com
Converting your power doors over to manual will just require replacing the regulators for the windows and swapping the longer rod extension for the interior lock from the old doors. (Just the plastic screw on piece, not the metal rod!) To go the other way doesn't necessarily look too hard, assuming that your '86 is the same as the 87+ models and the power door/window stuff is self contained and can easily be attached to the main harness. You would need a donor car in that case for the wiring though.