welcome aboard the first thing you should do is go over to
http://www.ricehatersclub.com
and become a member now for the mods
first get rid of the god horrible shifter ford has provided us. to make use of the power we already have switch rear gears to at least 3:73 it will feel like you added 30 horse power. next underdrive pulleys,all will work good but buy steeda so you can add a timing adjuster later,cai,ibetter plugs try ngk or autolight stay far away from the bosche plugs stangs don`t like them fro some reason. as for exhaust i like flowmaster exhaust myself
and work from there as for the pipe get a bassani they seem to get the best reviews.and don`t forget the mill eliminators unless you have a fetish for check engine lights.