Rear disc Brakes on 8 3/4

What do we do for a parking brake? Is it integral in the caliper? Friend did an Explorer 8.8 and all he had to do was get a second "shortside" axle and trim the base of the "longside" axle tube (its a spot weld into the carrier section, unlike a 1 piece case of a 8 3/4) by drilling out the spot welds, pulling the tube out, using a pipe cutter to trim about 3 inches off to match the shorter axle and pressing it back in and filling the spot weld. Perches were not mentioned but are an EZ weld up. Now he gets a ford yoke on the end of the driveshaft and he has disk brakes, parking brake and a Ford limited slip diff with 3.90 ish gears. 150 for the rear , 30 for the axle and machine work. Your disks are cheaper though. Anything we can do for better stopping is always worth it, but rear disks have been debated for cost effectiveness.