I can add that I've learned that you need valve covers with at least as good of baffling as stockers and then utilize a pcv with a Steeda oil separator inline between the pcv and vacuum source. I'm gonna epoxy some plate under my valve covers for baffling and do just that. Also for the breather a filtered catch can plumbed from the opposite valve cover is a good idea for when the engine is ran hard so that pressure can be vented without oil as well.