Keep all of the disk brake assembly as lots of people like converting their earlier cars from drums to disks, just knock out the lower ball joint and upper ball joint, plus keep the foot pedal and power booster assembly too. Lastly also keep the brake line splitter block mounted to the chassis under the master cylinder. That gives you the complete system that can be sold off. You may wish to keep the rear axle assy out of it too, the hogsheads are needed from time to time and the brake backing plates with the rest are popular too.