Not Ranked
With a stock cam, the vacuum at idle should be fairly constant. If you do not find a vacuum leak, I'd look at the carb. Have you checked the float level? If its way too high, gas might be spilling into the throat giving you the rough idle and bouncing vaccuum reading.
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Warren
'Liberals are maggots upon the life of this planet and need to get off at the next rotation.' (Jamo 2008)
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