318 crankcase breather question

Most of the aftermarket carburetor air filters I have seen are packed with a small fitting that goes into the bottom of the filter assembly. This fitting has a hose that goes to a valve cover, providing filtered air for the pcv system. The other end of the pcv system is the pcv valve and a hose to the manifold (or maybe the base of the carb). Manifold vacuum is lower pressure than the filtered air inside the air cleaner, thus the airflow is: filtered air into the crankcase, via the valve cover - then from the other valve cover to the manifold via the pcv valve. 6dart9, you just need a tap into the bottom of the air filter housing and some 3/8" vacuum tubing.