Porting is a very good mod. You don't want the porting smooth unless you are going to run the track. A baby smooth porting job for street is useless.

I did a whole thread on it, pretending I didn't know about it. As far as poering is concerned, it's the same for gas and diesel. Intake porting is more important than exhaust.

http://www.Moparfins.com/forum/forum_posts.asp?TID=3069