I put all '72 (as already said, this works with other year trucks as well) brake and suspension parts on my '68. This way, I know what I have, and I can get what I need at any parts store when I need something.
It ended up costing more, but I have: all new ball joints, tie rod ends, calipers, master cylinder, prop. valve, brake lines, wheel cylinders, rotors, drums, brake hoses...... the list keeps growing