I need help with my HEATER CORE swap
 

Sup guys. I got the dash out ,and can almost get the heater box out . Has anyone here NOT discharged the a/c to replace the core ? I tried to pull the box out,but something is holding it up (a/c)

I have the 2 closet screws outta the heater box,I just cant get the 2 under the cowl.

Any ideas ? crazy

Its a 97GT