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#14
02-11-2008, 09:26 PM
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Re: 70 Z28 Engine Block Casting Numbers
As I recall the 3970010 casting # was used for a large variety of applications and years. Someone will need to check this but I think that casting # applied to 2 and 4 bolt mains and ranged from the late 60's thru the late 70's.
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Carl 
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