Thread: 622 bbc
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Old 08-15-2007, 02:51 AM
  #8  
FAT622
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JOURNEYMAN
 
Join Date: Apr 2007
Location: Australia
Posts: 32
Default 622 bbc
the heads are big m super mod, 420@ .850, i will take them out to full polish specs of 433@ .850.
what octane fuel will be needed with this combo?
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