I have seen a couple 2dr conversions with just one long window which would be over 6ft long. They did not have the (did they make this) factory look I was going for. My one window is a slider just like the Tri-Five Nomads and I was able to shape my opening to accept shortened stock GM stainless. My C-pillar has been narrowed and maintains the same original angles and gives me the design flow I wanted. The earlier Malibu 2drs had a narrow straight C-pillar that did not appeal to me. I usually start out by cutting and pasting pictures, drawing and building diecast or plastic models to see what direction I want to take with my design.