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Posts by JimGTA

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pcv valve rough idle valve cover
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#5 ·
Is it the "XE" version of the 268 cam? Looks like you are running the "RPM" intake with a carb spacer so a lot of plenum and runner volume. Not surprised by the lo vacuum (if it is the XE) although you may be able to squeeze a bit more out of it.
 
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