Wheel Bearing: Rear - 64-72 A - 10 bolt Type 2 Standard"10 Bolt Buick Olds Pontiac" Cylindrical Roller diff bearing as shown as spec's are below. A Standard diff from factory.. but NOT a Chevy 10 Bolt" Bore (IN) 1. 378 Inner Ring (IN) 0. 700 Outer Dia (IN) 2. 748 Type 3. 000 Width (IN) 0. 700 BUT A LISTING IS THERE BELOW FOR YOUR REFERENCE. PURCHASE OPTION SEALS.. to keep it simple .. if you need the axle oil seals.. order BW29431N them below.. one for one side.. 2 for both etc. Fitted to the 64 70 GTO