I want to give a shout and a lot of credit to the YouTuber with the 3minute video showing that this was possible in the first place. I just wanted to make a longer video explaining what I did and why I did it and exactly what you need to get to to be able to pull the evaporator coil and the heater core on these older trucks. the next generation after this there was a workaround where you
could basically cut an access panel that you had to glue back together. this is cleaner but a little more work on these older ones.

WHEN YOU LOOK AT THE FIREWALL THERE ARE TWO 10 MM BOLTS WITH SILICONE ON THEM. UNDO THOSE SO THAT THE BOX CAN MOVE AROUND A LITTLE BIT FREELY. ALSO WHEN LOOKING ABOVE THE BOX THROUGH THE GLOVE COMPARTMENT TAKE OUT THE TWO 7 MM BOLTS THAT HOLDS THE RELAYS AND LOOSEN THE 10MM BOLTS ON THE FIREWALL TO ALLOW THAT TOP OF THE BOX TO MOVE AROUND A BIT. I WILL JUST PREPARE YOU GUYS, IF I START GETTING THE COVER OUT WAS DIFFICULT, GETTING IT BACK IN IS A REAL PATIENT TESTER.