Any pics of a bare 1975 duster Firewall ?

[garyfish340]

I have a 1975 Duster, it came with heat/air. The cowl is different from a 1969 Barracuda. The air doesn't enter through the cowl, and down into that box with the door at the bottom/front. The whole cowl that is welded to the firewall seems revised to me, from the earlier A body cars. Does anybody have photos from a resto of a bare firewall, freshly painted is fine too ? I want to weld on the engine side of the wall, but I want to be sure I can do this safely. Thank you.

 

[gregpurcell]

This is a 74 Dart non ac:

 

[garyfish340]

This is a 74 Dart non ac:

What I am trying to see is behind the dash, behind, and above the passenger side heater/air box, the cowl attached to the inside of the firewall seems much more shallow than in the earlier 69-70 cars. I'm trying to decide whether to remove the heater box, cut a hole though the cowl, plate the reverse side of the firewall, than patch it up, and do a shock tower reinforcement on the engine side.

 

[garyfish340]

What mystery awaits on the opposite side of this wall ?, and can I get a plate of steel in there, and is it worth the trouble ?

 

[74DartSwinger360]

Its is empty space inside the cowl