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y72ss Jan 31st, 03, 11:10 PM What is the measurement of a '64-67 rearend versus a '68-72. mine is 55" backing plate to backing plate.I know it's not the original one. ------------------ '72 SS, 350,TURBO 350,3:73 CREAM YELLOW big gear head Feb 1st, 03, 4:17 AM The total width for the '64-'67 is 60 inches. The total width for the '68-'72 is 61 inches. y72ss Feb 1st, 03, 8:27 AM where are you measureing from BIG GEAR HEAD? ------------------ '72 SS, 350,TURBO 350,3:73 CREAM YELLOW big gear head Feb 1st, 03, 1:03 PM That is the total outside width where the wheels bolt on. ------------------ '69 RS/SS396 Pro Street 427 4 speed 9" Byars Performance High Performance Drivetrain Parts & Service www.lubedealer.com/biggearhead (http://www.lubedealer.com/biggearhead) y72ss Feb 1st, 03, 1:25 PM thank's for the info, it,s 61" so with a CI code it,s a 3.73 positraction from a '68 or ,69. ------------------ '72 SS, 350,TURBO 350,3:73 CREAM YELLOW | ||