i just ran into in issue with my build. the old breather chamber is no longer any good and i understand new ones are not expensive anywhere but i do not plan on using the pcv valve anyway. just a filter on the valve cover. b18a1 with machined hole no threads. is there a better replacement for the breather box itself. i found something that looked like a good idea on theoldone.com but it seems that it was designed for a b18b1 without the machined hole and it used the pcv valve still. HELP PLEASE!