MP valve covers knock out machined for pcv grommet (Chevy style)

Rock Able said

One variable in this equation is the distance of the baffle from the PCV. Right? Or are we sucking up vaporized oil? If we increase the distance of the baffle from the PCV without infringing on the rocker arms, wouldn't that help?

If we're dealing with vaporized oil, the catch can might be the only solution. Never had a problem with any of my SBC's.

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that was one of the reasons I thought it would be better to counterbore the inside of the v. cover , to place the PCV higher in the v. cover & further away from oil slinging around, and futher away from the baffle. Perhaps, a better baffle design would help, too.
of course the PCV location is usually opposite the vent in the other cover: ie. if the vent is in the front left of engine, then the PCV should be right rear of engine.