Almost forgot! Use some 550 para cord during the install. Start at one of the bottom corners leaving about 2 feet of excess and four inches away from the end of the windshield. Wrap it around the gasket on the glass, in the body groove of the gasket, overlapping on the bottom to the other end of the windshield, again up to about 4 inches away, and a two or more foot excess.
Position the glass at the bottom first, then lay it against the the car. With an assistant, have them push the glass down and in, lightly, at the top to help keep the windshield seated. With the pressure applied, pull the 550 cord that overlapped, out. The windshield will begin to seat. Once you reach the corner of the windshield frame, pull the other cord along the bottom out. The windshield will now be seated along the bottom!
You will need a 90 degree pick tool like I used (it's what the glass installer used on my 78), to help pull the inside lip of the gasket around the window frame pinch weld so the gasket doesn't tear.
Use glass cleaner as a lubricant on the gasket and the frame. It helps a lot to pull the gasket in around the window frame pinch weld without it binding and tearing.
Any other questions feel free to ask!