In a 94 GT. I have done it before on my '89 (yes it's a bitch) with the help of one of the walkthroughs that's been floating around. The one with the pretty good pictures of the 87-93 Fox? But what about the 94-98 cars? Is there a walkthrough with pics of this job floating around anywhere?
1. Remove evaporator case from vehicle.
2. Remove four heater core access cover screws, then cover from case.
3. Remove heater dash panel seal from heater inlet and outlet tubes, then pull heater core out of case.
4. Reverse procedure to install.
Check a haynes manual or online at (v)autozone.com
The dash is heavy and awkward.
There are 3 8mm bolts under the defrost trim near the windshield, and a few more inside (after taking out) the glove box. Both kick panels have bolts under them as well.
I always pull the steering wheel off to help with weight and size, but really only the steering coupler has to come loose. There are alot of conne`tors so take your time and have a buddy. Dont rush it, the dash plastic breaks easily as well as the connectors.