Quote:
Originally Posted by Mulletwagon
OK, did some additional testing. Manifold vacuum is a steady 23 inches - seems a little high.
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Your vacuum reading is good.
The higher the better (more efficient) unless some one timed the engine using a vacuum gauge (setting the timing at the highest vacuum reading usually results in too much initial advance and pinging and thus bearing damage). Is your distributor original with electronic conversion, or one with centrifugal advance?