Spool - Mini - 26 Spline - Steel - 7.5 in - GM 10-Bolt - Each Brand-ALLSTAR PERFORMANCE MPN ALL68166 . **NOTE: THERE ARE THREE DIFFERENT 7.5 GM CASES. SHIMMING BETWEEN THE CASE AND THE SPLINED SIDE GEAR MAY BE REQUIRED TO ELIMINATE SPACE BETWEEN BLOCK AND SIDE GEAR. USE SHIM KIT RAT1100, TWO KITS MAY BE REQUIRED. This mini spool is designed for open style (non posi) carriers only. Truck Freight NO
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