I have a 2002 Stang and I was wondering what I have to do exactly to my engine to add a 6, 7 or 8 psi supercharger. I talked to a couple techiees, and they told me that a stock 02 engine is ok for only a 6,7, or 8 psi charger. I want some more power with out huge $$$. They told me that you would...