I am gonna port n polish, and port match a head and lower runners, intended for 12-18psi on a 7mgte(not nessarily stock ct26). So my question is, how much larger should i make the ports and runners. I dont entend to enlarge the entire runner. If the ports are 2 1/8" wide and 1 1/4" tall, would 2 1/4" by 1 5/16" be good enuff? More / Less ?? I intend on using the NA cams also. Hi RPM at mid range to high speed is what i am looking for from this.