Not Ranked
the pics in your gallery the engine? nice.
looks like you're running a pcv valve in addition to the valve cover breather, if this is the case you're running air through the engine into the intake. plug the breather hole or pcv line and see if the afr is better.
the cleaner looks like it could have an effect also if the top is in too close proximity to the air inlet or choke horn or the well tubes.
my guess it is the first one.
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