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Thread: 509 on block
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Old 02-06-2011, 04:31 AM
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SSedan64 SSedan64 is offline
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The 509 is probably an internal Foundry mold/cast #.
The 010, 020 is Tin & Nickle content.>> http://www.chevytech.info/2c42o8.html hopefully it was actually added.
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