Changing out the compresser on the fixed orifice ac Ford 91?

To change the compressor on a 1991 Ford vehicle with a fixed orifice AC system, first, ensure the system is fully discharged to avoid refrigerant exposure. Disconnect the battery, then remove the necessary components such as the serpentine belt and any brackets obstructing access to the compressor. Detach the refrigerant lines and electrical connections from the old compressor, then install the new compressor, reconnecting all lines and electrical components. Finally, recharge the AC system with the appropriate refrigerant and oil, and test the system for proper operation.