I have an AMC A904 that I plan on putting in a '70 Javelin (Mopar adjacent). I got the transmission with the car so I have no history on it. I am transmission ignorant so when I saw a numbered plate above the valve body I didn't know if it was stock or if someone has been in the transmission before. So, looking at the picture, is this stock?

Good news was the pan looked really clean (no metal).