Just make sure the master cyl is a 2 part & not a single for the brakes.
If the single goes out you have no brakes.
The hoist is run by a PTO shaft from the trans, Should be two knobs in the cab, One to put in gear, Have the clutch down when this is put in gear or it will grind.
The other one is to lift the box, This can be puled all the way out. Then just use the clutch pedel to stop or start the lifting.
Be shure to have both of these pushed in when driveing the truck.
Have herd of some who have forgot to push the PTO in & gone down the road 55 MPH. Those shafts would realey be going around, Could fly off.