Some info about 8.25 diffs.

To clarify.....

Disk brake axles and 8.25 sure grip carriers that work on our classics are not found on the same vehicle.

You would need a 96 or older axle for the carrier and a 2001 or newer axle for the disk brakes.
(might not be 100% on 2001 being the change to rear disk- going by Dakotas)