The thinking behind the PCV comment is that different PCV's will act in very different ways at idle. When the PCV sees higher idle vacuum, it should shut down partially to avoid having too much air injected under the carb at idle via the PCV. The old standard Mopar metal PCV's don't shut down the flow at the lower idle vacuum levels produced by a cam like yours. So you may have excess idle air flow via the PCV, depending on what PCV you have. We moved away from the standard 60's metal Mopar PCV for this reason.
