I studied WallyBody's pictures for a long time before I cut into mine. I also bought used parts for mine - they needed a little rust repair around the tops of the windows before I started but since I was welding anyway I didn't let it bother me too much. It turned out really nice, and I haven't spread any filler on it yet.
Here's the pics of mine, starting at the bottom of page 3:
build thread including 5 window conversion
