This is copied from a post I made a long time ago. The info is also posted in "Suspension FAQs".
Here ya go:
Spindles and calipers are from the 12" rotor (not 11") 78-90 full size Caprice, Caddy, Delta 88, and Pontiac. Typically wagon, police or with HD towing package.
Brake calipers, (1)#18-4021, (1)#18-4020
Brake flex hoses, #BH36848
Brake caliper hose bolts, #483-205
Brake pads, # D52
Brake rotors, 1LE, #5994
Wheel bearings, 1LE inner, #BR6
Wheel bearings, 1LE outer, #BR3
Bearing seals, 1LE, #19753
Hub grease caps, 1LE, #13977
If you're tearing down the steering too, here's the part #s:
Tie rod, inner, 78 Malibu, #ES2034L
Tie rod, outer, 78 Malibu, #ES2033R
Centerlink, 78 Malibu, #DS909
Idler arm, 78 Malibu, #FA1013
Ball joint, lower, 78 Malibu, #FA3000
The tubular upper A-arms required should have ball joints already installed. My preference is the Global West conversion arms for 12" brakes, but Hotchkiss makes them, too.
Tommy