I would consider switching them, but the holes were already there, would make for a long hose in my case. Windage? Or acceleration, don't believe the crankshaft windage is getting up there, but can see oil piling up in the rear of the valve cover. Will keep an eye on my hose to see if it is overly wet. If these Mopar Performance covers ever came virgin, would have preferred the holes up front. Breather gets in the way of the heater hoses on pass side. My '72 318 has the PCV Valve on the drivers and breather on the pass side in the middle of the stock covers, and have a baffle that runs almost the length of the cover.
It's always something!
