Re: Mecum Pontiac Super Duty's
421 Super Duty engine was factory rated at either 405hp or 410hp (13:1 compression). Two fours, mechanical cam, dual points, aluminum exhaust headers were part of the deal.
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PaulD
'64 R-Code Mercury
'62 421 SD Catalina
'66 L72 Impala SS
'66 R-Code Fairlane
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