It depends on which distributor you have. If you have one with a vacuum line going to it, simply remove the line from the distributor and plug it off so it won't leak. start the engine and time it the conventional way with a timing light hooked to #1 cylinder wire, which is the front one on the driver's side.
If you have the HEI set-up, with the coil in the top of the distrbutor, then connect a Tach to the TACH terminal on the distributor and the other lead to battery negative, UNLESS the instructions for the tach you are usung specify different. Some tachs will specify Tach term inal and battery Positive.
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It depends on which distributor you have. If you have one with a vacuum line going to it, simply remove the line from the distributor and plug it off so it won't leak. start the engine and time it the conventional way with a timing light hooked to #1 cylinder wire, which is the front one on the driver's side.
If you have the HEI set-up, with the coil in the top of the distrbutor, then connect a Tach to the TACH terminal on the distributor and the other lead to battery negative, UNLESS the instructions for the tach you are usung specify different. Some tachs will specify Tach term inal and battery Positive.