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09-04-2013 03:30 PM #3
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- May 2003
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- Zephyrhills, Florida, USA
- Car Year, Make, Model: '32 Henway
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A 402 block (4.125" bore) coupled with a 454 crank (4.000" stroke) makes a 427 cubic inch motor. The original 427 used a 4.250" bore and 3.760" stroke. More than likely, you cannot bore the 402 block to 4.250" without hitting the water jackets, so be happy with the 427 you already have would be my best advice, assuming that the 454 crank and rods clear all the interior components in the 402 block.
On second thought, I'm thinkin' that the block is bored to 4.250" already. Otherwise, where would you get pistons for this combo????? Custom 4.125" pistons for a 4.000" arm would come pretty dear I would think.Last edited by techinspector1; 09-04-2013 at 03:52 PM.
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A belated Happy 78th Birthday Roger Spears
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