Hi One,
What I did was to cut the entire lip off. You have to be carefull when doing this. This is the point where the roof is welded to the rest of the car. Once you cut off this lip, you will have separated the roof from the body. Once this was done, we removed the extra sheet metal welded to the main piller. You have to be carefull in this step because you will get to a point where there is no metal behind it and this material has to remain in place.
Cool...
To finish the area off and reatach the roof to the body we are going to weld a flat piece of metal to the inside edge of the window surround. This piece will protrude out into space in exactly the same position as the original drip rail (picture that if you can). We are then going to roll this material up onto the roof and piller tracing the path of the drip rail.
When we are done, we will have a visible bead that follows the window opening all the way around. We are going to attempt to duplicate the same detail that surrounds the rear vents (same height and width) so that it will look like an original design eliment.
At least... That is what we are planning. Things tend to change when you see them life size and in person.
Hope this helps.
SN65
PS: Also, you may have a problem if you try to roll that lip up the way you are discribing. You will actually be folding the metal of the roof seam all the way back onto itself. It may work, it may not, I do not know. I guess it is a judgment call you are going to have to make.