Hey man - question for you on this. Since a PCV valve really cannot work at WOT (no vacuum at wot), could you also run the header evac system in addition to the tuneable pcv valve? Not sure how the plumbing could work in that scenario. I do drag and drives - so idle, cruise, AND WOT are places where I would like to vent crankcase pressure better.
Best not to mix and match like that. The Wagner unit will do a great job at keeping vacuum in the engine at all but WOT. Since no one runs WOT all the time, you are really dealing with idle & mid throttle issues with the PCV.