I am hooking up my Holley Sniper Fuel Injection. On my 670 Avenger I had 4 Vacuum ports, one for the Brake Booster, one for the PCV, one for the distributor and a full vacuum port I used to for the vacuum canister for my heater controls. The Sniper only has 3 ports, A full manifold port (small nipple), brake booster port and one for vacuum advance on the distributor...... How/where do I hook up the PCV? I have an Edelbrock Airgap 2601. The manual shows a 3/8" NPT port on the rear passenger side of the manifold and it looks like it taps into the runner....does that port draw vacuum? Mine is blocked off right now. Thanks!