Thread: Drill or not
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Old 09-03-2014, 07:51 AM
  #2  
BigBlockMark
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Join Date: Mar 2014
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If it is drag race only, you do not need them. Assuming you are putting them on a 400 block, you might want to consider tapping the steam holes in the block and plugging them. May prevent cracking from steam hole over to cylinder or bolt hole.
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