Well first I have to say "WHAYDA WAIT SO LONG FOR A NEW
STANG" you must be married... jk

. sweet deal with the new
stang, I love those cobras, sexy sexy. lets see. The bigger the exhaust is the mroe horsepower, the smaller the exhaust, the more torque. The only real way to get huge horsepower is Cubes. With a stock blower, and some add ons I can see you getting around 475 horse on a good day. You'll have to do quite a bit to get 550 BHP and torque.So that means Lots of bottom end and lots of top end. But I have faith in ya. as for a shop that sells street and strip suspension I am not sure, I have never purchased any strip parts myself. But I do know you want to buy fully adjustable parts.Let me know how it turns out.