74 spindles and 11.75 rotors

Wheel bearings after 1973 are the same for ABE and FMJ cars until the end of the rear wheel drivers. So that takes you out to the mid-80's or such.

And actually, wheel bearings do interchange between some C body cars and some ABE cars. It just depends on the years. Even some of the light trucks use the same inner wheel bearings as ABE and FMJ cars.