They are the spindles with the larger inner wheel bearing diameter, and are the sought after spindle to do the larger 11 3/4 inch rotor disc brake upgrade on 1962 -72 B body cars, 1970-72 E body cars, and 1972 and earlier A body cars.
These spindles have the...
DISC BRAKE SPINDLES. 73-74 E Body Cars & 73-76 A Body Cars