72 Duster build - Pro touring slant six

Red Stripe said
Got around to pulling the hood the other weekend and stripped the old paint off and gave it a new coat. Always had some rattles so I figured there was some junk in the gaps but turned out to have about 50 acorns stuffed inside. Damn pests! So it was a good thing to pull it. Also added in some heat/vibration material to quiet things down and installed some mesh screens on the hood scoops while the paint was drying.

I want to keep the chrome valve cover but without any baffles the oil spilling out at higher RPMs is bugging me. So installed an oil breather/catch can to see if it helps. If not the stock valve cover is going back on. I do need to replace the valve seals so this is just a band aid solution for now.

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I put a catch can on mine this year also. It's amazing to see how much oil would actually go right down the intake manifold prior to having it! I'm running a sealed can instead of having it vented to the atmosphere. If I vent to atmosphere, my engine tends to have some oil leaks. Having the crankcase vent connected to the intake prevents those leaks. I'm sure some oil is still making it down the intake, but the can does catch most of it. Autocrossing fills it the quickest, likely because of the constant high RPM pulls. Under normal conditions, it doesn't get much in it.
If you are still having some leaks, maybe try a sealed can.