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Very good block. Same one as I found. 1971 casting. All around beefier block than '74 and newer blocks. The main webs in particular are thicker. It is also the first year casting with the current 9.503" deck height (older 351W were 9.480"). I had the block sonic checked and there was more than enough material to safely take it .060" over on the bore.

Regards,
Greg
 
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