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455 harmonic balancer question

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Old January 3rd, 2022, 02:04 PM
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455 harmonic balancer question
This is probably a dumb question but why does the 455 harmonic balance or on my 1970 455 have two timing hashmarks?
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Old January 3rd, 2022, 02:15 PM
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Do they look factory,or like someone added one? Do you a a adjustable timing light? If so check and see if second mark is for total advance.
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Old January 3rd, 2022, 02:23 PM
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They look factory,
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Old January 3rd, 2022, 03:53 PM
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Can you share a picture with us?
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Old January 3rd, 2022, 04:04 PM
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Yes, let me climb under the car in the morning..
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