Need help with dash removal

[WhiteThunder]

Ok, I've read the thread on installing a heater core and I have the dash removed up to that point. How do you go about removing the box that the blower motor is in as well as the heater core.

I have the box im talking about is highlighted in green.
View attachment 303140

Now I believe that the box in green is connected to the vent system (highlighted in blue) but they should both still pull out if they are both disconnected from the firewall. I've looked all over and removed every bolt I can see but I can't get the box to come out. Anyone have any help to offer?

I'm trying to get everything removed so I can clean up all the rust in the cabin and that box is the only thing hindering my progress. It's gotta come out anyway as I need to put in a new heater core.

 

[dgollem]

Check for bolts on the firewall side?

 

[Beasty306GT]

if u got ac...u need it vacuumed dry...and u gotta disconnect the lines goin to the heater and ac on the fire wall

 

[WhiteThunder]

Thanks guys, yeah I have AC. I'll have to get all that done this week so I can finish ripping my dash out.