How do you access the heater core on a 1992 F250? Do you have to remove the AC evap coil?

 

Behind glovebox. I've done 3 so far. Nothing to them really.

 

Did mine recently, IIRC, I had to remove the glove box then it was pretty straightforward. AC didnt interfere, just unbolt the panel in the heater box and slide the old one out. I changed my coolant and added sca's when I did mine also.