Then I stick with what I said......most likely 73 / later A body setup, MAYBE with the larger diameter calipers. Measure the pistons to find out. That "may not matter" to whoever buys them.
I cannot tell about the caliper brackets......do they appear cast? If so, factory. If flame cut, then aftermarket. Check the rotor bolt pattern as mentioned, and maybe the bearing part no which will tell you if they are early or late spindles