where to mount rear spoiler on 73 duster

Yes, the mounting brackets fit from underneath and MUST go into the cut-outs. If you don't use the brackets, the weight and movement of the go-wing will dent or crease your deck lid's outer skin in no time. Think about how thin the sheet metal is there. The wing's pedestals actually mount to the brackets for strength, rather than the sheet metal. Here you can see the pedestal bolts coming all the way down through the bracket.

Jerry

Go Wing 01.JPG

Pedestal 01.JPG

Wing Bracket 01.JPG

Wing Bracket 02.JPG