dont do it, It may be a good deal with the tires, but their stock ford bullits...you can get new bullits for like 125 each and they look alot better, deep dish is only 150 if you can fit it.
That and new tires are probably cheaper than a 5 lug conversion. What you should do is just save up money untill your out of high school, and just drive your car untill then, dont worry about being faster, just worry about having a nice car, then by the time you get out you'll have a ton of money to just go nuts with.