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Reply to "Air Cleaner Base - what does the hole do?"

Thanks for the replies!   I need to get closer and see if it's connected via a PCV valve ('regulator valve' on the diagram), but the hose (highlighted yellow) that comes out of my driver's side valve cover goes back into the manifold.  

It sounds like a more stock setup would be to have that hose go to the air cleaner, then have a hose from the lower port on the carb connected to the oil filler cap.

With all of that said the car seems to run well and I haven't detected any oil leakage.

pcv question

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