Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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It looks like the only engine option to get the 2x4BBL carbs was the 421. Here's a link to Pontiac Engine codes.
Hope this helps... Ed
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Ed Bertrand 1968 RS/SS L-89 396/375 Convertible CRG Member |
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