VOTE: Change front end Hilborn duster - sharktooth in hand- duster or demon front?

The Demon front end is probably the most aerodynamic of all the front end options you have, except maybe the Valiant. Grille has the shortest vertical profile, and no big flat bumper like the Duster's had. The splash apron pulls more air into the radiator, and provides a better spot to mount a spoiler or air dam up front.

I'd run a Demon front end with a '67 Camaro spoiler. Similar idea to the panel below the grille on the '73 Duster you show, but with a more stock appearance.

Like Peter (GmachineDartGT) has his Dart set up...



Instead of this



I'd bet that between these two options the aerodynamics would be pretty similar, and you could always go with a larger spoiler/dam on the Demon front end and still have a more stock appearance vs using the Duster front end with a fiberglass panel and dam.

Not sure what it would take to make the sharktooth grille work with the Dart front end parts. I don't think the grille would make much of a difference with the aerodynamics, I think the Dart/Demon bumper and splash apron are the biggest benefits.