1971 Duster Handeling

If you're at all handy with tools, you can fabricate a front spoiler. I did it on my '72 Challenger.
Make one out of cardboard, cut and tape 'till you like the fit then transfer to flat piece of plywood. Figuring out mounting brackets will be time-consuming, but do-able.
Make room for brake ducts in case you want to add some later. Paint it satin black and it'll look fine on the car.