In '71 and '72 the Skylark and Cutlass got the 8.5 corporate 10 bolt, which was stronger than the old 8.2 BOP 10 bolt. Pontiac continued to use the 8.2 and Chevy used the Chevy 8.2 and 12 bolt. There were some exceptions I suppose.
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Freddie
1969 Camaro RS/SS396 (427) 4 speed
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