I messed changing button assemblies putting torqueflite buttons where powerflite 2 speeds in a 56 .
The mechanisms interchanged, as did the buttons ,
But limited experience .
The odds are very good they will interchange, buttons just pull off, - except neutral, caution. (thnx Mark)
Don't try to open it up, it'll come flying apart like a wind-up clock, ask me . . . lol