Mustang grilles are actually a bit recessed. I have an aftermarket aluminum one that's ever further back, and it deletes the GT fog lights, so I have a large, mostly flat expanse to work with. Did you already mention what you used to weight the flaps? A thin aluminum bar on the backside of the center area might be enough to stiffen it up, and could serve as the weight (depending on how much weight you need).
~SM
|