Like Rick said...you want torque not HP. Be prepared to be disappointed if you spend money on a procharger kit. I had an 02 GT before my Cobra that I put an intercooled Novi 2000 kit on. Badass blower but terrible on a street car. You slam the throttle and say to yourself "that's it"? There is a reason everything out there now runs a TVS or twin screw. GT500, ZL1, Hellcat, ZR1 you name it. Sounds like your budget is tight so anything more than 400hp/400tq is going to cost you your shortblock anyways. Have fun with your decision