What? He ported the outside of the cylinder heads inside area? What the hell was Dan thinking? Did he just want to take some time to perfect his technique? Yes, what the hell was I thinking, I need to perfect my technique and more importantly the cylinder head just begged to be all it could be. Once in a while you come upon a set of "Perfect" cylinder heads. They just cry "Port Me". You know in to the bottom of your carbide tap. It just has to be done.