Thread: 406sbc motor: Block #3951511
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Old 02-18-2009, 03:36 PM
  #9  
chevynovaman
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YOU COULD HAVE THE HEADS MILLED, MIGHT ADD A LITTLE COMPRESSION, 400-425 HP ON THE STREET SHOULD NOT NEED A MAIN GIRDLE, BUT IT NEVER HURTS TO HAVE ONE.
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