favorite 4bbl slant intake

Hello,
Do you or did you ever run a positive crankcase ventilation with your Clifford manifold? I have the Clifford with the Weber 38/38 carb. When I got the car it just had to vent caps on the valve cover. I hooked up a PCV system to the manifold. Now having a hard time timing it right. The vacuum is really strong, so I'm assuming a stock PCV valve may not be right. Any suggestions on what PCV valve I should be using? Thanx
Dual Flow Adjustable PCV Valve | M/E Wagner Performance Products