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Old 06-13-2007, 05:17 AM
  #13  
billhendren
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MASTER BUILDER
 
Join Date: Dec 2005
Location: Rutherfordton North Carolina
Posts: 192
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Dart and Brodix blocks have 1.500 thread engagement and need no helicoils.early G.M. blocks have .990 and in a high power application heli coils would help.Bill
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