Thats not the route you want to go. We put together a vortech s2k a while back and tuned it on aem at 12psi and it was dirt slow.
Dont waste your money man... Turbo. The s2k comes with forged internals from the factory.

Just saying, when you are WOT in your charged s2k at 12 psi, the guy with the cheap turbo kit at 10psi is gonna blow your doors off.

Hope this helps.

Bill