I took mine out of my 67 Dart to tint the windows (though I scratched them up putting them back in so I ended up retinting them in the car, lol). They weren't terrible to get out, just had to pull the tracks out and pop the windows off the rollers. If you can find a picture of the windows out of the car there are slots in the bottom with a bigger hole at the end. I think the idea is to get the roller to these holes so you can just pop them off the track and take the window out. Then regulator should be pretty easy I would think after that. It was just a bear wrestling with a heavy window trying to get them back on the tracks in the car without scratching stuff up. I just loaded my regulators back up wtih some spray white lithium grease and hosed down the rollers with the same. Work them a lot out of the car with grease and I would think they should free up. Not sure about rebuilding them completely, didn't try taking mine apart. If you end up needing rollers try RT Specialties, they looked like they had most of them.