I'm not sure what type of FE you're using, but I know from experience with my BBC engine that stroker engines do require the ability to breathe. Otherwise, the intensity of the
oil and vacuum will force
oil out of the nearest orifice and leak. I think breather caps in the valve cover or possibly this
oil evaporator tank is a requirement, but I would like to know that the valve cover breather caps and the oil evaporator tank serve the same purpose or not. Maybe both. Again, I'm confused. Where's 'xlr8or' when you need him?