excessive 340 crankcase pressure

What the OP has (the three pictures including the separator) is not a functioning PCV system from what I can see. Rings are probably ok - but the sytem isn't working the way it should. One PCV in a valve cover, one breather on the other side and no separator. It will function just fine. If the OP wants a separator for that 2 horsepower it gives the Hellcats and so import and new musclecar guys can love him instead of being confused by the lack of technology - plumb it between the PCV and the carb nipple, and I would not pace it well below the level of the valve cover.