The stock speaker for AM/FM is in the dash, under the grille on top. It's a single paper cone 10 ohm speaker, and even when reconed don't have very good audio quality, like a transistor radio.
Only when equipped with stereo receiver or stereo tape were the stereo speakers installed. My convertible came with both the kick panel and rear speakers from the factory.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching