Charging an AC is not hard if you have a pressure guage. You are in a hot climate, so you need less r134a. Heat causes it to expand and if overfull, it has no room to expand further causing less cooling.
With the pressure guage attached and at around 2,000 rpm, the pressure should be at 45lbs with the compressor disengaged and around 30 with it engaged. If the clutch rapidly turns off and on, it is usually because the system is under pressured.
If over pressured, just use a long handled philips screwdriver and let a little coolant out until the vents get cold. Don't tell the EPA you are doing this.

The power steering fluid needs to be flushed if the pump is making noise. Less than 1 quart of tranny fluid will do it.

The S belt should be good for at least 50K miles, most last for 70K.

If there is a screetching noise at start up, use a stick held against your ear and the other end on a suspect part. It works like a stethoscope. Just watch out for the moving belt. When you place the stick on the offending part you will hear it quite well.

Klaus
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I still miss my 164