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hi, I have a question, I have a 71z with a 81 motor, I have been noticing a fair amount of oil in the air cleaner coming from the valve cover breather hose, what causes this condition and the next question is I noticed black speckles on the garage floor from my exaust .
( related? ) thanks for the help or ideas
 

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First, have you checked your PCV valve? If it's sticking, it could cause excessive crankcase pressure, which could result in the symptoms you are seeing.

If that's not it, check your compression. If your rings are worn, you could be seeing excessive blowby.
 
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