Evacuate the refrigerant. Disconnect the A/C lines at the firewall (there may be a bracket and/or grommet to remove at the firewall). Remove the glove box and panel behind it. Unplug the thermistor and, if necessary, the blower resistor. I can't remember if the case drain hose pushes into the box and needs to be disconnected or if it just has a fitting that slides into a hose attached to the firewall. There are three or four, 10MM head bolts/nuts that need to be removed and the evaporator case pulls out. It's a much easier job than the newer ones, which require the entire dash to be removed!