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For big block what is the spacer length between the alternator and cylinder head on the upper long bolt for a non-ac car? Is it 1.25" or ? Getting belt squealing when I rev.
As long as the belt is straight you have right size spacer. Squealing is usually the belt slipping, when Alternator is under a load, usually after a start or reving in neutral. My alternator is approx. 11/4 from head. Make sure belt is tight and not glazed from slipping on pulley.