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  1. Big Block Roadster Builds
    Can my 1968 428 Police Interceptor block 4.17" be bored take NOS original bore 427 4.23 stroker pistons? My block has the extra webbing main with the stick weld "C", but are the cylinders thick enough? Did different castings have thicker cylinders? What 390 blocks can be bored to 428?
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