What was this part?

[sixpkrt]

It looks to have been cut to make something else fit, as you can see, only the partial part number is visible.

 

[pnora]

Looks like part of a 68 b-body center air block off plate.

 

[R413]

It fits the 1968 standard dash only. This is only 1/3rd of it.

 

[threewood]

It looks like a piece off of a 68-69 switch panel.

 

[R413]

Center dash piece for no AC vents. Seam is where I added red lines.
This piece is plastic. The dash switch panel is pot metal. Same shape

 

[threewood]

Learn something new. Is that only 68 model year? My 69 is padded over that area.