Ported heads

I'm curious too. I was toying with grabbing some boneyard heads, and trying to improve them a touch. That way when I blow my first headgasket, I'll be ready for it. How much can be gained with minor porting, port matching??
 
They make a world of difference. Champion irons, boost went from 22lbs to 15lbs. It really has more bottom end and no lag.
 
Top