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Bruce Lancaster · 03-20-2012, 10:42 AM

Second vote, rotor is 100%

Secret information I found recently in an olde speed magazine: When that pulley is used to drive a 4-71 GMC blower, it will fail once boost goes beyond 5 pounds!

03-20-2012, 10:42 AM	#3
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Need Help Identifying this Part Second vote, rotor is 100% Secret information I found recently in an olde speed magazine: When that pulley is used to drive a 4-71 GMC blower, it will fail once boost goes beyond 5 pounds!