I found this site helpful for planning the cut glass:
http://www.cadvision.com/blanchas/54...indshield.html
It is where the cuts need to be that I have not figured out yet.
It looks like I will need to take a little material off the top, and then more off the corners as the windshield leans back.
It is the inward angle of the roofposts that has me worried, I will probably have to widen the top which I was hoping to get away with not doing.