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timing marks are references for the distributor ti fire on a compression stroke. The index mark is on the crank damper pulley and a marker is fixed to the block near there so when the motor is running with the index mark illuminated with white chalk or yellow and a timing light usually on number one piston you know where you are at. The degrees of time should be located on the radiator support or the hood with your emmission requirement, tune upe, spark plug gap, idle speed. or call autozone

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13y ago

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