Need help ID'ing Ford rear brakes

[Ghost's68]

Hey guys so I'm about to get ready to lower the truck again after installing the ECE drop kit, all new brake parts, and completely re-doing the front steering. I'm looking at the rear end brakes and would like to swap out the rotors and brakes since it's torn apart.

I have no idea where and what the Ford 9"rear end came from. Can some one help please. I'm going to try and do some research also but figured I would ask you guys as in sure I'll get quicker help. I wasn't able to measure a rotor since I ran out of time.

Here's some pics. Thanks