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To duplicate the stresses on the block when it was initially machined and to ensure round bores, etc., a very specific torquing procedure is specified. Even the thread lubricant provided by GM must be used. Urban suggests following this exactly: "GM spends unbelievable time and money to get the most from this equipment--the least we can do is follow their instructions on torquing." Notice how Urban has written notes to himself on the block regarding the tolerances he saw on the mains during his initial mock-up of the parts in the block. View Related Article
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