You'd think they could've designed it to be on the other side of the firewall somehow.
Ah well. Anyways, yes you'll have to remove the dashboard, although not completely. Gotta disconnect where the heater lines plug on to the heater core first.. then you basically remove the seats (mostly for more working room,) remove the center console, drop the steering column, disco. whatever wiring harnesses are between the firewall and dash, remove the bolts holding the dash to the firewall, pull the entire dash forward, prop it up on something.. crawl up under there somehow and remove the bolts holding the blower assembly to the firewall, remove that, remove the door, remove heater core..