They look good with or with out! It's your car what would make you happy and go with it!!!
No need for a Go-Wing, the car looks great without. What would really make the car pop would be rear window louvers!
I never liked the go wing look. But have you looked at the ducktail spoiler for these A-bodies? They look really sweet in the right application.
wait.. what? who makes louvers for the dusters?