Functional hood scoops, or no hood scoops. Either way.
I'm happy with the power and suspension.
A few more touches to the interior: guages, ac knobs, headlight knob, maybe the brake lever. None of these are a big deal though.
I'd love to see a manufacturer put RCA pre-outs on the stereo, but that's not a bullitt issue =) Heck, they could run them and a power and ground wire to the trunk at the factory. (just daydreaming). Or maybe just have a nice built in sub.
Window louvers (sp?)
Unique rims. Why put bullitt wheels on the gt's? ARRGGGHHH
They should have used some cool valve caps, like the bullet shaped ones I got. That's really minor though.
Most of all, some documentation from ford. Posters, plaque, whatever. Maybe a nice leather jacket?