The stock intake manifold is fine for even blown strokers. You can port it if you really want to.
If he hasn't done any mods yet I would suggest a Moroso Cold Air Intake and exhaust cutout before the axle.
www.sybersport.com Email Darren at
[email protected] and tell him Grip sent you. Ask him about Cold Air Intakes for your friend's car. He'll get you the best prices when you're ready to buy.