[Chevelle-list] Vacum

[Jim & Chris]

I am  finally getting back to my Chevelle , rookie question but here goes. which is the best port to measure the vacuum and what should the vacuum be ? I have a knock and its not running on all cylinders . The motor is a 454ci , with a stock rebuild with a mild cam. 915 miles after rebuild..with a few hard ones squeezed in. Thanks for any help, Jimmy C.
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