Thread: '66 ZL1 Corvette
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Old 09-21-2015, 01:42 PM
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Carleen Carleen is offline
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Default Re: '66 ZL1 Corvette
1966 Corvette Stingray Convertible

NEW 427 GM ZL-1 aluminum big block (part # 3946053) w/ new GM aluminum rectangular port heads, part # 12363401,

The newly ZL1 blocks 12370850 have Casting # 3946053

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