You will get a bunch of different opinions on this but this worked great for me. I have a 70 dart I think it's the same stile. Put the rubber gasket on the glass first then fit a string or twine in the groove of the rubber channel that goes on the body of the car. Make the end of the strings hang down from the bottom corners of the gasket, then lube the entire channel with soapy water or silicone spray. lift the whole thing up and set in the lower windshield frame make sure the strings are in the inside of the car. Then start at one side and pull the string so it grabs the inside lip of the molding and it will start to fold over the metal channel. Go slow and push down on glass from time to time. I did a little on one side then went to the other until i met in the middle (top). I did this by myself and had no problems a helper would have made it even easier. I did not use any sealer on mine, some say thats the way the factory did it. I have not water tested it so I will post the result's when it gets wet. Make sure you put the molding clips in first and good luck with the moldings it's hard not to scratch something.