Now that depends. If you want to retain the small bolt circle, any 66-72 A body with the Kelsey-Hayes 4 piston brakes will work. If you are thinking of going to the large bolt design, any 73 and later A body with disc brakes will provide the needed parts. With either choice, make sure you get every component including all of the hardware and fasteners, distribution blocks, and hoses. If you’re sourcing 73 and later brakes, make sure you get the upper control arms as well, you’ll need the larger ball joint for the disc spindle, ditto with the lower ball joint for the K-H brakes.
