Breathers, PCV question

I have mopar performance valve covers that only have a vent hole in one of them and oil fill ports on both. Should I drill a hole in the other and put one hose with a pcv to the carb or intake manifold and the other side to the air cleaner? Other question i have is I'm running a open air filter with bottom and top lid, should I drill a hole in the bottom lid and put a fitting in?