kris is done with the porting, and john hildebran will show us the next step. now that the head has been polished and it's ready to move on, john, who is a machinist here, is gonna be showing us how to get the perfect angle for the valve. the valve job, right, right. each head gets a different kind of shape to the valve job itself. now this one i've already started. this is where they start at. this is bare. there's no valve job at all. i'll show you what happens. right now, this is a perfect circle. you're talking about the angle right here, right, right. how it gets sculpted out. see, this will eventually go down in here, but it has no place to sit, so this machine cuts this. so it fits perfectly. fits the valve, right, and it makes a perfect seal all the way around. we pretty much know that the intakes are four angles and the exhaust works better with a radius. what i'm gonna do is go down first and just touch this one. i roughed it in, so i had to get the right valve depth. i'll show you what happens here. the deeper in the green sector it goes, the better