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

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.