Steering box removal/replacement
IMHO...
Disconnect everything that needs to come off BEFORE you unbolt it from the frame.
You can unbolt the pitman arm from the box OR from the tierod / cross bar, all depends on what you are doing.
Roll pin from the steering connector, be sure to unbolt the steering column from the car and support it so you don't damage the steering shaft. And use a proper roll pin punch and backup the other side so you are not damaging the input shaft bushing / bearing
Hoses last so oil is not everywhere