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My new Y block is a 55 to 57 272 and is the bore the only difference between the two motors and if thats the case is the block thick enough to bore it to a 292 size.
Butchering up everything I can get my hands on in Dayton Ohio
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junkyardjeff (3/21/2010)
My new Y block is a 55 to 57 272 and is the bore the only difference between the two motors and if thats the case is the block thick enough to bore it to a 292 size.The majority of the 272’s can be bored to the standard 292 bore size (0.125” over) but there are those rare few that have core shift or block imperfections that prevents this. Sonic checking the block before boring would be the only way of knowing this for sure and preventing some possible headaches later. Even blocks with heavy core shift can occaisionally be salvaged by offset boring using the sonic test data.
  Lorena, Texas (South of Waco)
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