I just went through that--took me a while. It is practically hidden under a hose that runs across the back of the valve cover. If you kneel on the cross member above the radiator and then reach down just behind the intake plenum, you will find it. But why does the valve have two hose fittings and you have to plug one, when I see single hose PCV valves all over the rack?
INLINE SIX POWER!
300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!