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Old 02-18-2010, 03:08 PM
COBRA36 COBRA36 is offline
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Join Date: Jan 2004
Location: Hobe Sound, FL
Cobra Make, Engine: Integrity 351 Windsor - moderately modified.
Posts: 67
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Default Grade 8 Bolt

Our believe a grade 8 bolt has 6 lines or marks on the head of the bolt and the others have 3. Hope this helps
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