You might want to try one of the later truck LS motor pcv valves. I switched to that and it pulled in less oil but still got some. So I put in an inline fuel filter and that seems to have almost eliminated it completely. It's the glass one so I can see if the oil is accumulating and there's a little bit, but not enough to even need to empty it out.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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