Help me with my windshield!

I have been looking around the forum trying to find out how to put this new windshield in and I haven't had any luck! I have a 75 duster and a brand new windshield to put in it. I'll buy the gasket when the time comes. I had a glass guy that was going to do it for me but that's looking like it is not going to work out. I have also called some glass places around town and they don't mess with anything that old. I cut the old windshield out so can't remember exactly how the gasket went around the glass. What my question is that is there any "how to" or can somebody walk me threw the install for my Abody? Any help would be greatly appreciated!!