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jacobgiles
 Post subject: bore spacing
PostPosted: Dec Sun 21, 2008 5:03 pm 
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Location: atoka tn
can somebody explain what bore spacing the block needs to be for NPS ?
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kireol
 Post subject:
PostPosted: Dec Sun 21, 2008 5:51 pm 
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ENGINE:
...Big block engines are limited to a maximum of 640 cubic inches and must use stock OEM block bore spacing and cylinder head bore spacing for OEM engine type.
...
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jacobgiles
 Post subject:
PostPosted: Dec Sun 21, 2008 6:03 pm 
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Location: atoka tn
right, that is what i dont understand. oem meaning dart and how they designed my block?
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RICK MILLER
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PostPosted: Dec Sun 21, 2008 9:09 pm 
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OEM Borespace is 4.84
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bbnova
 Post subject:
PostPosted: Dec Mon 22, 2008 9:01 am 
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OEM refers to General Motors in your case. Dart is an aftermarket block that is designed after the GM block. Make sure the block you have or are getting has a 4.84 bore spacing. That is the distance between each bore measured center of bore to center of bore. You can measure the edge of one bore to opposite side of the adjacent bore to measure it.


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