I'm noticing some seepage from the covers, and it is not surprising since I've had the covers off half a dozen times without replacing them, but I'm about to make a cap for the rear breather hole on my Anson covers, and drill a new front hole on the driver side (clearance issues with the brake booster mean I can't run a breather back there).
Wondering if there is a particular gasket that will seal better - I made the mistake of putting a high flow pump in and I get a LOT of oil in the heads. The ones I have are a rubber/cork combo.
While I'm at it, I currently run a Ford Racing cap with some foam filtering, a 1" push in style. Should I be concerned about contaminants getting through?