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Mecum Pontiac Super Duty's

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10-11-2006, 09:39 AM

Paul D

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Join Date: Oct 2004

Location: Austin, Texas

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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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