If u get your bearings from doctor diff u don’t need to remove the center block. Also if you’re putting on rear discs u need green bearings to keel the axles from moving side ways. Kim
You don’t need green bearings to run rear disks. Some kits require them, but DoctorDiffs rear disk brake kits can be used with the factory adjustable tapered bearings.
I run DoctorDiff’s 11.7” rear disks with tapered bearings. It’s right in the description of his brake kits.