You need to get a manual on your car to do the job right.
However, here is some advice:
Just had mine replaced. Ford tech told me you only remove about 15 bolts and screws total then loosen the steering column and let it hang down. Then the entire dash is simply moved back out of the way to expose the heater box. He had mine down in 3 hours. There is no manual to tell you how to do this job unless you get one from a ford technician. The Haynes manuals are a joke, don't waste your money buying one. The ford tech said he would show me which bolts to remove. I post that later. Labor cost for this was $700. Heater core was only $75. Antifreeze about another $20. You can do it if you take your time and don't get in a hurry.
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