I have just started driving my Challenger. It has a 528 hemi. Right now I have a moroso breather with the nipple for a hose on each valve cover no hoses hooked up yet. Can I just t these breathers to the nipple on the air cleaner or is a pvc to the carb a must have? I have about 100 street miles on the engine and no issues I can see. The valve covers are the Barton Stage v cast covers.