6 pack hood on a 73 - 76 swinger

Now having the rib in the center of my hood, I cut a little out of the center front of the scoop so it would sit down on the hood.
Which you may have to do that as well before you lay mat down on your hood.

As for your "flipped" up edges so to speak, you may have to sand it how you want it and add mat inside the scoop and then add some fiberglass filler on the outiside to fix it. But maybe if you cut out for your rib in the center of the hood, it may sit down better.
I hope this helps