Defrost to Heater box attachment?

[wegner426]

I have a 74 Cuda with a non-AC heater box.  I have looked everywhere and haven't found any good pictures or parts listings of the attachment method for the defrost duct to HVAC box.  There is a gap there that looks like someone before just used some tape to seal up.  See pic for better explanation.
Does anyone have a picture of the part or know where a person can get it?

[crash340]

I dont think anything covers that gap, others may chime in, my car is original and nothing is there, nor are there any screw holes.

[anlauto]

There is supposed to be an open 1" gap

[Finoke]

Yes, gap is correct

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[burdar]

It's been said that the gap is there to draw in some cabin air.  It looks like it's missing a piece but it isn't.

[js29no]

It's been said that the gap is there to draw in some cabin air.  It looks like it's missing a piece but it isn't.

   

[wegner426]

Thanks all, I will clean up the residue from the previous owners tape job and move on!

[YellowThumper]

I concur with all above.
Have had my 74 since 83. Never been touched. Just a big ol gap.