You can do it by yourself also. With boost it's not so critical to have ports as fine as with non boosted engines. Just make the exhaust ports big as possible and clean the bowls and widen up the area under the valve.Tim has done several beautifully shaped exhaust ports. Intake ports you can only clean up to match the intake gasket openings. There is several topics about porting too...
http://www.y-blocksforever.com/forums/Topic66122-3-1.aspx?Highlight=port
http://www.y-blocksforever.com/forums/Topic46226-3-2.aspx?Highlight=porting+heads