Wife picked up her new Mustang yesterday!

I would re-route your AC lines directly into your intake while your at it, good for 2 maybe even 3 hundred horse. A set of 13" gold spoke rims would really bring out the deer whistles.

I would also put on a roof scoop. And a sticker that says bitch in the rear window as well.
 
wide whitewalls, fender skirts, a continental kit, turned down spotlights and a foxes tail on the antenna to go along with the curb feelers would make that stang stand OUT in a crowd.

Or you could go the Mississippi route and mount 4 different tires and sizes with different colored steel rims, 1 of them rusty of course. Put a rifle rack in the back winder, weld an old rail road rail across the front for jump startin Skeeter's truck after someone stole the battery and raise it up with some F350 springs. If you can't find springs (you'd have to mow your yard to do that) some pieces of 4X4 wedged up in there good and tight always works. Drizzle some ta-backy juice down the drivers door to complete the look.