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Click on image for the lowdown. 
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#30181 10/10/2002 12:29 PM | Joined: Jan 2000 Posts: 206 Member | | Member Joined: Jan 2000 Posts: 206 | These are sizing marks used by the factory to match pistons to bore size. If you have the original pistons, the crowns should be stamped with numbers that match the ones on the block. | | |
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