Thread: Factory 4bolt main 350SBC block Peak Horsepower
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Old 11-29-2009, 09:09 PM
  #15  
kwkracing
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Join Date: Dec 2004
Location: austin texas
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OOoh, i know the secret!!! They where rusty seasoned blocks!!! If you through your dart block outside during winter it should be good for another 150 hp when you machine it!
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