It's a PITA. You must:
1. drain cooling system, and disconnect heater hoses
2. discharge AC system and disconnect evaporator hoses
3. drop steering column
4. remove console
5. tip entire instrument panel away from firewall, and working through that space, remove heater/AC box
6. remove evap. from heater/AC box
7. reassemble in reverse order
If you have an FSM, and the time/patience, you will save a TON of money. (You will still need to recharge the AC when done, unless you have your own stuff to do that.) If you opt to let the pros do it, prepare for a pretty steep bill. Ya gotta pay somebody to deal with this hassle :bawl: