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Re: Confused about block casting number
My memory says that the Z28 blocks were higher in tin content. I could be wrong, as that memory is over 45 years old. I last worked at a Chevrolet dealer in '72, just before joining the US Navy.
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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