I have an '05 GT, black with red racing stripes. The stripes aren't as thick as I'd like them to be, but when I get a new hood, they won't be there anyway.
I cannot stress this enough; if you have the money, get the stripes painted on.
My stripes are stickers, they were there when I got it and they were professionally installed. Still, they are starting to fade and peel in some spots, mainly on the back bumper underneath the license plate and in other similar little grooves on the body. I hate them and I'm going to have them removed ASAP.
Here is a link to AmericanMuscle.com that has a few pictures of a yellow Mustangs with the scoops installed.
Personally, I prefer the yellow scoop on the black stripes, without the scoop striped.
The bottom line is, do whatever you
like or what you
think looks best. After all, it is your