Radio Delete Plate ?

I came across a radio delete plate
casting numbers
68579
2770557 - "D"
2884773 - "F"
anyone know what its used on
plastic rectangle 2-1/8 by 7-13/16 by 1/4 thick
2 plastic hollow studs on back for speed nuts
5-3/4 pin to pin
email pa340dart@hotmail.com with cell #
can send pic by cell/text

One application is 70-1 Dusters with Standard Dash. I parted both years that had one. I am sure it was used on other A-bodies and other years....

thanks that was fast
will post in 4 sale column
once I figure out new laptop
xp to 8.1 too old for new technology