PCV issue

Thanks for the replys. It is an Edelbrock 1403 (500 CFM). I've ajusted the idle mixture screws with it idling around 600-700 RPM. I turned in each fuel/air mixture screw until bottomed and then ran each out until I got best vacuum. I'm not sure about the cam. Motor was just rebuilt prior to buying the car. He put solid lifters it it, so I hope it's a solid lifter cam! The cap that holds the PCV valve does not have a seal in the bottom of it. Would that cause enough of a vacuum leak to cause a problem? What about going to the next size jet and metering rod? Would that help the idle's lean condition? Thanks again for the help.