Roll it in.
I did it on my car, it's really easy.
If you do to a track like NHRA, they won't allow a sharp edge on tour quarters unless it's factory.
Plus, it's a lot stronger to boot.........
anyone ever roll the rear fender lips and take a porta power and swell them outward? I did that on my 67 hemi car. if you ever see one that the rear fenders are swelled out about 2" , you`ll know where it came from. was told it was just sold about 1 1/2 months ago.