Jake, that's exactly what I plan to do. I have chopped the windshield post 2" , which makes for a vertical chop, if I remember right, of about 3 in. The back bow I left stock and the two bows in the middle came down with the front header. The middle bows set so high that people don't realize that it's been chopped. The plan is rework the two middle bows and drop the back bow also to give it more of a Carson look and still fold back.
Your right, any time you move mounting points, things change. I took a while to get it all working right. I made my folding top for my roadster too. I don't I think I would try a top that had rear 1/4 windows, that adds another step to the mechanism and I getting to old for all that frustration!!
When I built the car I did it with a forward rake and it gave it the look I wanted. Now I have to reverse everything I did then. This time with the body on the frame!!! :roll: