there once was a Pontiac plan to have a large Firebird decal on the deck lid.

Revision 7 of the 1969 Pontiac Parts Manual contains a diagram outlining exterior ornamentation of the 1969 Firebird with the W66 400 Sport Option.

Revision 7 also revealed that Pontiac intended to accent the plateau of the Sprint-6 hood with a smaller, but similar bird.

https://www.pontiacv8.com/blog/2024/1/1/what-a-large-bird-decal-on-the-1969-firebird-400deck-lid