Oil fill cap / breathers for trick flow valve covers

No provisions or knockouts they will need drilled out just trying to find something that will work i thought some one has use these valve covers would have a suggestion thanks

I have no suggestions. Trick Flow provided me with one of the first set of those covers back when the came out. Those covers look great and they are very well made but when I asked "what about the baffles" and they never answered me. Drilling a hole for a breather is no problem but there has to be a way to attach a baffle or else they are going to blow oil. I ended up using the set they gave me on a dry sump engine. They worked perfect on the dry sump engine since we wanted it sealed up tight.
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