Mustang update #10
Still working on removing the rear axle. Need to disconnect the hand-brake lines to free it up. To do that I needed to remove all of the brake parts. You can see the spring-loaded hand-brake cable poking out the bottom here.
Here is the axle fully disconnected. Also the shocks.
Close up of the serial number on the differential.
And here is the underside of the car without the axle.