I was wondering how much horsepower I would gain from a port/polish, and P&N intake, and a 207 cam.... I was planning this for next summer, and it's a nice chunk of change.. just wanna make sure I'm getting what I'm paying for.... or would it be better to save for something else?.... I know I want to get 8.8'' rear end with trak-lok and 3.73 gears. I'll need a chip at the same time as the gears... so that's an additional $400.... maybe this is a two summer project?.. would it be best to get the rear end and gears and chip first? I'll have to get a new chip when the P&P is done... or no? Also, does anyone know of a vehicle that has an 8.8'' rear end with 3.73 gears and trak-lok that'll fit a Mustang?