It was recommended to me to do it but I'm running a blower and the pressure was blowing the breathers out. I opted to weld thread bungs in my covers and run braided line down to my header evac system. IF I still have issues I will go to a pump. I would say, if you are not drag strip ONLY not to worry unless you see the need. I have run regular breathers for years and NEVER blew one out till now. As for freeing up HP...... you would have to weigh out the need versus cost and the fact that every time a belt is added to the crank it takes HP away, even to make more. Plus added maintenance and belt alignment, etc......
Hope what ever you decide works for you,