Congrats and nice find. Did the previous owner give you a reason the factory tires are not still on the car?
whaaa? you're not even going to swap pulleys? these things are slow running stock boost! if you would just add an upper pulley, and tune to your list of mods, you'd be talking about close to 100hp on top of what you already have! you'd also have the satisfaction of knowing that about 98% of the time, you could smoke the car (and easily too) sitting next to you, at that stop-light (around here at least). but when you are only running 8 lbs of boost....that percentage drops quite a bit. haha