Hi Jim K,
As Buoymaker suggests, the easiest road to take is to just keep the road draft tube, and run sans PCV.
BTW, when you plug that fitting on the valve cover, I would check to make sure that the vent slots on the valve cover are clear. I am actually surprised, BTW, that when installing the PCV kit ( which includes adding that fresh air inlet fitting ) the instructions do not include plugging those vents. At least I did not see that referenced in the instruction sheet posted by phak1.
It seems strange to me that they would have the installer go through the trouble of installing that fitting (which provides filtered air to the crankcase) and still leave the slots open - which would be a source of unfiltered air.
Perhaps if anyone has access to more detailed instructions, they could shed light on this.
In the event you ever move to California,
or decide to run with PCV, I will try to clear up some of the confusion.
There are several air flow paths for various PCV systems:
In the one on my truck, shown in the pics, fresh air gets pulled into the crankcase through the small oil bath filter on the filler tube. It gets pulled out from the top of the valve cover, via the tube connected to the PCV valve, through the valve and into the intake manifold. In addition to a reduction in oil contamination due to improved management of blow by gasses, this system also ensures that only filtered air goes into the crankcase. Some may debate the effectiveness of that small oil bath filter, but it is better than just being open to atmosphere.
In the kit, the airflow appears to be in reverse. Air enters the valve cover from the add on fitting, as supplied by the tube connected to the carburetor air filter. Air is pulled out of the crankcase from the filler tube, through the PCV valve and sucked into the intake manifold.
To answer your question, in either with-PCV configuration, I would consider blocking those valve cover vent slits. Once again, it seems pointless to me to configure a filtered fresh air inlet, while still leaving an opening for unfiltered air to enter the crankcase.
Best Regards...
