Hi Brad... I like Drew's black Challenger retrofitting the new model challenger's front spoiler... looks smooth and slick, and not too low. However, I being that you (as I, too) appreciate and desire the "vintage" pro-TransAm appearance. I've been real-close to submitting my pre-pay orders to thje AAR spolier guy so he could move forward with the molds and eventual production of the replica full-width spoilers -- i honestly feel he needs to advertise and promote them better -- ther ARE AWESOME for apperance, and certainly functional at hi-speeds. BUT.. I too fear the dreaded potential damage, being that my T/A sits low.. in street trim with BFG T/As, and lower with my 16" race rims. BUT ALSO, I want "function" at hi-speed lapping roads course events.
Now... here's an idea.. Consider the Mopar T/A split front spoilers. I like the dsign, by default, that they have the split opening... because I can slightly lift the front end/bumper and then slide my floor jack under it to lift/service whenever needed.. very conveniant! Imagine... having a full-width front spoiler with a hinged-type of "center section" that can allow that portion (~12-15 inches wide?) that can simply be flipped up to allow a floor jack to slide under the front of the car? With the solid full-width front spoiler a floor jack won't fit.. not conveniant! With a hinged center section, the width would always be down (perhaps velcro'd or clipped to the balance width side spoliers) while driving/lapping/racing, so to get full effective function and advantage of the full-width front spoiler.
You know I personally want a full-width front spoiler, as it'll give awesome appearnce, different than the normal T/As, etc, and compliment the pro-TransAm Vintage appearance, and truly be functional on hi-speed road course lapping events.
For pylon autocross events (lower speed), I would pass on the full-width as we need all the narrowness possible to squeeze between the pylons.
Finally, adding some type of front decal(s) to the front spoilers makes it look more awesome (in my opion!)... just look at my car..;<)) and some race sponsors want/require front-end advertising.. again.. see my front spoilers.
I DO PLAN to someday make this design that I've described above.. having a hinged-type front center section (for floor jack access).. and full width effectiveness for hi-speed function as well as awesome visual appearance and differentiation from all the other normal T/A front spoliers.
Regarding brakes ducts, I favor them, but there are alternative ways to hook up the hoses other than fro the spoiler openings... they can be routed from the lower valance sides.. another idea in the works.