P&P the heads! I got mine done (chip will be the last thing I do after the SVT LIM c/w 19lb/hr injectors & SVT Cams) our cars go a bit wild after some P&P work. I ended up with 15hp and 10 lbs/ft from this mod alone, but you can really feel it. It was the single biggest gain of any mod I did. I think the next best was the MSDS headers before that, which got my 10hp, and 5 lb/ft.
So go and do it, and just try and take that grin off your face.
