Trying to identify brakes

since I don't know for sure and don't want to assume, would the spindle also have come from the B body? I have ready about changes needed when doing the swap to disc such as the upper A arm to get the bigger ball joint, any way I can tell for sure what my whole assembly is?

I think I am gonna name the car "The Blue Mutt", its like Johnny Cash built this car, one piece at a time.