I don't have an evac system since mine is a street car. I use a 'fixed orifice' pcv. (black block) It's not a traditional pcv though, there is no springcheck ball inside it, just a Holley air bleed for a constant, fixed amount of air flow. The outlet goes to the Moroso air/oil separator you see on the back of the head then back to the throttle body. I used this setup on the dyno and there was no HP loss. After I got it home, I opened it up to check for any oil and there was only water from condensation.
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