Later rear brake arrangement has the rear lever pointing down. Simply doing this gives a "reverse lever" effect, the rotation of the brake cam being opposite to the wheel rotation. This can improve braking efficiency, plenty of discussion on the Forum. Have a look for any other location for the outer cable end ferrule, adjacent to the swing arm tube.
The cross lever lying parallel or therabouts to the frame tube at rest gives the brake good leverage. I'll agree about the cables, it can be a lottery. Images of later bikes will show the later cable routing.
From experience, never throw anything away. Bikes in standard trim are easier to move on, if and when. So keep all the original parts.
I hate that design of " Tip Toe "stand feet. Later stand has more rounded foot pads, makes getting the bike on the stand a bit easier.
Swarfy.