By the way this is the kit I used and depending on what fule and psi you use it goes anywhere from 500rwhp to 1000rwhp and even more but youd have to be crazy. Here's the links this is the one I used:
http://www.turbochargedpower.com/79-...urbo%20Kit.htm
This is the main website and there are many kits to choose from:
http://www.turbochargedpower.com/
Well good luck with your build