95 Blazer Power Steering Pressure Hose

Hello, I have a 95 Blazer 4.3 V6 W. I am trying to change the pressure hose on the power steering. The bolts are heavily rusted and hard to reach. Does anyone have any ideas on what I should take off to access the bolts and should I replace the power steering pump also? I have looked at how to replace the pump and it says to take off a few things like the pulley, does the same thing have to be done to replace just the hose? Thanks.

If things are as rusted as you say, the valve on the pump may come loose when you try and break the line loose(back of the pump), then you'll need to take the pump off to hold the valve while loosening the line. If I remember right, the pully will need to come of to pull just the pump, or you may be able to take the pump with some brackets as an assembly.