Here's the problem. I have a set of nice old aluminum valve covers I would like to use on my 350, but the problem is they only have holes for twist on style breathers (not push-in style with the rubber grommets). I'm trying to figure a way to set up a PCV valve to work with these covers. I would like to run a breather on one side and PCV on the othere. I don't really want to drill another hole in them. Are there any solutions out there?