So lets get some for sure steps down...
1) remove the entire drip rail in one piece.
2) Bend 1/8" rod to contours of window.
3) Tack weld 1/8" rod in between roof and former window channel.
4) Completely weld in entire rod moving around and pacing yourself to reduce warpage
5) Fill in area with filler, using window edge of rod as your new defined line.
Now I started this post and am trying to put together the necessary steps to complete this project. I'm just guessing at these steps from the info. gathered here and if someone who has done this before can give me a thumbs up
on the above steps that would be great. If its not the right way please correct them so that we may follow in your footsteps
.