Thread: Jeff Boone's 1969 Chevrolet Impala SS 427 Conv. 425 H.P
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Old 06-15-2019, 12:52 AM
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All big blocks were cast on molding line 1 at Tonawanda. All small blocks were cast on line 2. The "conv" and "HiPo" wording on the housing cores had no significance by the late 60s.
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