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Re: timing?????
NO, NO, NO, doing the vacuum reading method only over advances the engine, usually with seriously bad results.
DO IT RIGHT, PLOT THE MECHANICAL AND VACUUM ADVANCE CURVES WITH THE ENGINE RUNNING, AND SET THE TIMING CORRECTLY, WITH A TIMING LIGHT, AT IDLE.
Avoid the over advancing issues and problems, don't use a vacuum gauge to set timing.
Sorry, I've only been fixing the different ways, like this one with a vacuum gauge, for people that got into lots of trouble from setting timing incorrectly, for over 40 years so far. I build custom ignition systems for a living, and KNOW how to do it the right way, and, using a vacuum gauge to set timing AIN'T ONE OF 'EM.
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