I dont think porting on a stock setup will change a thing. You may increase flow a little bit, but early ZZP research on their SC dyno showed that even a stock setup suffered from a vacuum deficiency due to a restrictive TB design. That is, you could improve the flow but the stock TB is unable to flow enough air to keep up. Drop a pulley, free up the exhaust, install an intercooler and a ported TB or N* and then you could look at porting the SC outlet and smoothing the hump out of the inlet.