i love 05+ mustangs, and im saving for one once i get outta college; but please don't take on payments when u have a basically paid off stang. Any econ major will tell you why many Americans don't know how to use thier money, as soon as they make a lil more cash, they see an opportunity to go further into debt and the ol' "well i can for this and that now, i make more" eventually creating an illusion of wealth when really your raise just brought you down to where you were before w/ the new payments. Even w/out the raise, once your car's paid off your mean income goes up, and is a raise in itself. With the raise, start making double payments on your car and once that's paid off you truley do make a substantial more per month/year. Then saving for a blower and all the accompanying mods to make it reliable wont even effect your current accustomed lifestyle.
This isn't really directed towards you or what kind of person you are, just citing an example.