I have the Edelbrock victor Jr. heads, so it has a separate valley pan, from the intake. I hooked my vacuum pump in the valley pan just to kind of hide the line, it is a NSS car trying to keep the old school look. I took a piece of aluminum and made a baffle where the line plumbed in. Just drilled a bunch of 1/16 holes and spaced it so the line could draw air. I get just a couple ounces in the catch can after each run. I have some guys tell me their setups don't pull any oil in the catch can, but I have never had that happen in the valve cover or the valley.