excessive 340 crankcase pressure

I have never ran a "catch can" and see NO reason for you to run one. NO, NO, your motor will NOT puke oil. I wouldn't let you mess up that damn good looking car.
I have ran a vac u pan system to my headers in the old days but not on anything driven on the street so forget that idea.
One PCV valve to the manifold vacuum, and TWO regular breathers. That way you only need to drill one valve cover.