904 Identification

My Dad has a 904 that I am looking at installing in my Barracuda. I’m having a hard time finding anything on the id of the trans. The number is either 373 3632 3258 or 873 3632 3258. It’s gonna be powered by a 360 that I am building. I need to know the year so I can purchase a rebuild kit for it from Mancini racing. Thank you for the help.