Well, i dont have a 9"drum in back, always was a 10" drum set, unfortunately now I have to find who buys me the drums of 9 " I ordered online. Rookie mistake.
I think what you mean to say is written the other way here: The car has 10" drum brakes. But you need some of the parts, including the drums. First check the width. Its may be the wider rear drums, so check. Look at the shoes for the number stamped on them. Assuming they fit, that's another way to figure it out.
The rear brake hose is too short! It can't be under that much strain every time the car is lifted. There needs to be a gentle curve even at full extension,
The right rear brake line should be attached tight to the axle housing. If there's no clips welded to the housing, make a retaining clip that will be held by one of the differential cover bolts. Sorry I can't ID the diff. I'm sure someone here can.