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#6
06-14-2024, 08:40 PM
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Isn't a 454 just a 427 with a stroked crankshaft? They both shared the same block in '69 and '70.
If the '69 model year had been extended into 1970, Chevy might have added another COPO number for the 454. Who knows, stranger things happened back then.
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 COPO 9561/9737 M40 X11D80 13.37 @ 105.50 on pump gas,drove it to NATL TRAILS and back [email protected] SCR22 
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