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Old 05-19-2015, 07:17 AM   #8
Tom Wesenberg
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Join Date: May 2010
Location: Mpls, MN
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Default Re: Model AA engine question

Bert's in Denver likely has a good AA stamped block. Lots of blocks have been restamped over the years. An original stamp will be on a natural rough cast surface, not a smooth surface. The A block and the AA block are identical, except for the number stamp having an added "A".
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