73+ Duster Tail light bezel shave questions

I've seen some pics out there of 73 and up Dusters with the tail light bezels removed / shaved, and am thinking about doing this myself.
What's involved and does anyone have pics of the process?
One main reason is that mine always seem to leak, even with new gaskets it seems to trap water somewhere in there.
What does the tail light gasket look like on the inside after the conversion?