AC to non AC heater duct question

[Insubordination]

Hello

I'm in the process of converting my old defunct AC heater box, to a non AC setup. I've gotten hold of a non AC box, but forgot to remove the big duct pictured below (in a picture shamelessly stolen from the web) from the car. I think I still have access to the car, but do I need the duct?

So, riddle me this: is this duct (the one at the top) different on AC and non AC-setups?

Thank you!

 

[Wile E]

Yes they are different, you will need the non-a/c duct

 

[Blake442]

Every single piece of the non-air system is different than the a/c versions...

 

[Insubordination]

Yes they are different, you will need the non-a/c duct

Thank you for the quick answer. I suppose I need to remove the dash to get it out (and in again)?

 

[Insubordination]

Every single piece of the non-air system is different than the a/c versions...

And here I was hoping GM made some mass production shortcuts 🙂

 

[Blake442]

Yes, you'll need to pull the dash.

Take everything you can, including the glove box.

 

[Insubordination]

Yes, you'll need to pull the dash.

Take everything you can, including the glove box.

The glove box as well? Thanks for the tip!

 

[Blake442]

Yup.
The non-a/c glove box is smaller than the a/c version.