heater box removal

hi i dont think i am the best person to advise you for this job. all i know for shure is the box would not come out in one piece. after seperating the two halves it came right out. i also took the nuts of all the studs in the moter compartment that were in the area of the heater box. i think i am going to have nite mares about puting this thing back together. good luck