First Drop the steering column in the seat or take the seat out for even more clearance
take out the 2 bolts on top underdash cover and the bolts on the side holding the entire dash panel
once that is out of the way take the nuts holding the heater box from inside the engine bay and if equipped the AC lines.
then a few vaccum hoses, one cable and power to the fan motor.
after you get the box out remove about 10 screws holding it together to get to the heater core.
AZ 30 bucks
reverse to install
Nothing to it unless you've never done it before LOL
ps taking things apart is always easy but putting back together ???????????