Does anyone know what the numbers 25290 mean on the shifter side of a 69 automatic Amx transmission? I can't read anything else on the plate that the numbers are on.The engine was a 343. Is a 727 tranny compatable and would it fit a 343?

I found some receipts stating that the transmission was worked on in the late 1970's. No idea what was done. Tried to call the shop that did the work but they are no longer around. Help! Before I take it to another shop for another
paid opinion. There is no kick down rod installed on this tranny.

Thank you very much