4v cobra conversion.. WHAT WILL I NEED?

I'm looking for a range of 400 to 450 Hp, nothing to crazy, but i cant just supercharge my engine the way it sits...right? I would need forged internals correct? ......................this is the link to the rebuilt 4v supercharged engine that i was talking about..http://cgi.ebay.com/ebaymotors/03-0...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

vortech v2 10psi kit + tune + bolt ons = 400rwhp and great gas mileage and years and years of not having to worry..

its alot simpler than swapping in a terminator engine.. and a whoel hell of alot cheaper!!