Help ID a tranny off of craigslist

I found this: http://www.forabodiesonly.com/mopar/showthread.php?t=44853

Could they be stamped on the mating surface where the trans bolts to the housing?

Hey if nothing else I'm learning something, in between chasing the 2 two year old grandchildren around, LOL.

EDIT: I do find multiple sites that say the numbers are on the bell somewhere.