Ok guys I know some where are on here is a cross section of head to be ported. I have looked all over and cant find it. I think that phillip is the one who posted it from another site that shows where to grind. Ok so now that, that is said. I am going to be porting a head this next week and want to know is it the swirl in the chamber that is being removed?? Also i am porting the exhaust outlets also.