
Originally Posted by
tofu
Did your car already have a hitch, or did you need to have it installed? I had a hitch rack on my old car, but I remeber it being pretty $ to put the hitch on the Saturn. I wonder if they can even do that on a Mustang? I didn't even consider it, thanks!
ETA- Now you have me looking in to it!
Tofu,
Check out etrailer to see if there's a hitch available for your Mustang. It'll give you an idea of the cost and availability.
There was no hitch available for my car, but I got a shop in my area to custom mount a hitch. It wasn't cheap, but it was money well spent, since I can easily transport my bikes.
Hope you get a nice rack. 
- Melissa
ETA: Oops, I see that GLC1968 beat me to the recommendation for etrailer.
I'll get back on the bike soon, I promise!