Did I get two lefts or two rights ??
He doesn't need to drill anything, damn. I have the same exact pair of covers on my Dart. It had 2 twist in breathers when I bought the car. Mancini racing has a grommet kit for a pcv valve, just put the grommet in and pcv valve if that's what you want. Or buy 2 kits for a push breather. This is simple, or buy another brand of valve cover. Make sure that the baffles are in place under the holes.