Ford Repair: 1985 mercury colony park/grand marquis, grand marquis, colony park

Question
to replace the heater core do i have to go through the interior behind the glove box or does it come out through the engine compartment?

Answer
The heater case comes out from under the dash. If you remove the lower right bolt for the dash, it will come out easier as you can pull the bottom of the dash out a little for clearance. Once you have the case loose, rotate the top forward and roll it out from under the dash.