Welcome to FABO. Eau Claire, WI here. Been working on my 69 dart for couple years now & have gotten a few needed parts from guys here. Leave the duster front end on your car, looks better imo.
I originally put it on there because I thought it looked cooler being a little shorter. I supose that since nothing is really factory on her I shouldn't give it another thought. Hell, I have a Ford Aerostar radiator and BMW Recarro seats, not to mention all the mods needed to cram that motor in. so I'm not worried. It'll end up the way I like it, who cares if someone knocks it for not having all matching parts, right? One of the guys on this board already offered me a nose and grille for a dart sport, which is extremely cool of him, maybe I'll hold off for a while, though.