It doesn't matter which side has the PCV valve (which you should keep!). What does matter is that there is no location for filtered air to enter the crankcase. You need to have either a hose going from the air cleaner to the other valve cover, or a breather. You're sucking air out, but you're not replacing it. That will lead to more oil in the intake, and fouled plugs, etc.
Take care
~Chris
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Retired Moderator
MustangNet
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JimPorterRacing
RACECAR spelled backwards is RACECAR
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