You dont need to rebuild your bottom end. That turbocharger on your motor is good for 300whp maybe a little bit more but not much. Ditch the Blue Box that comes with it. It's crap. Have 99B16Si chip your ECU and tune Uberdata if you are strapped for cash. Uberdata with some 450cc fuel injectors will be good for 250whp - 270whp daily. Good luck