I say remove it and make it smooth if your light will still fit. By the way perfect job here. Your car is going to look so sweet.
Maybe add the slight peak that the deck lid has, if you remove the bump.
I have this widening trunk lid gap on my trunk on the '78.Now while it would appear that the gap gets bigger from back to front, what was actually happening was that the top of the quarter panel was rolling away from the trunk lid the closer it got to the back window. After some evaluation, we decided that the best way to correct the problem would be to make a relief cut in the top of the quarter and manipulate the edge to where we wanted it. Out of the entire length, only about an inch and a half was within our target spec.
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