Thread: 67 ZL1 ?
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Old 12-21-2008, 02:58 AM
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Default Re: 67 ZL1 ?
[ QUOTE ]
It have same marks underneath.
Ive have those at my iron block too.

Nikke

[/ QUOTE ]

Those look like classic peening marks intended to tighten up the fit of the main caps to the block. Seen that many times.
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