hi all when fitting an oil catch tank is it best to remove the pipe off the valve (pcv i think its called) under the throttle body and block it off then vent the crank case to the catch can or will it affect running with the valve not in use ???

i will be venting both rocker covers and crank case to catch can and then vent the can to atmosphere so i am thinking that it would be best to block it off and have no oil fumes in inlet manifold

 

I left my PCV connected. No running issues.
catch tank