Go Wing 73 Dodge Dart Sport

A lot of topics have been brought up regarding the go wing on a lot of different mopar models. My specific questions is has anybody installed this on a early years 73 dodge dart (the round mopar not the square :) Some sites mention the go wing and additional hardware needed for the under footing, and others mention a template that you have to cut the sheet metal. I don't see why you couldn't fabricate a curved footing to contour the trunk hood and mount it without cutting. Has anybody been successful or can mention a specific wing and hardware required. I don't like the way the brackets look after you cut into the metal...big empty hallow spaces look ugly if you ask me.

Thanks in advance.