Offenhauser intake
 

I have an Offenhauser intake on my 400, i noticed there was what looks like a crank case vent boot on the valley pan underneath it. Since this intake does not have the separation in it like a factory intake, how can i utilize the vent or should i pull the intake and close it off somehow? Do you guys have any suggestions? Is this a really good intake or should i replace it with one that more resembles the factory intake?