airflow is airflow, weather naturally aspirated or boosted. Air does not like to turn sharp corners, or have things in its way of flow, so anything you can do to help the air along its path to the cylinder and out again is going to equal hp and torque.
treat the ports and chambers the same as you would a naturally aspirated motor. A little clean up, port matching, combusion chamber work and a GOOD valve job all done by a reputalble shop that knows what they are doing will be money well spent. You will be suprised at the amount of hp you can lose due to a crappy valve job.... ive been there... 3/10s in the valve job alone.....