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Thread: 305 vs 307 (whats the main difference?)
          
   
   

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  1. 05-01-2005 03:47 PM #7
    techinspector1's Avatar
    techinspector1
    techinspector1 is offline CHR Member
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    crank. The 307 uses the 283 bore 3.875" and the 327 crank 3.250". Bore the block 0.125" to 4.000" and install a 350 crank 3.480". The block used to make the 307 is the late model large journal block, unlike the early 283 blocks which were small journal blocks and will not accept the 350 crank.
    Last edited by techinspector1; 05-01-2005 at 03:51 PM.
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