A833 cast numbers

Hi,

maybe anyone could help me out on this one.
a guy offered me a 833 trans and said it was for an a-body. He gave me the cast number on the trans-housing: C937372 and of the tailshaft-housing: C96706K.
I couldn´t find any of these numbers neither in the chrysler parts interchange manual nor at mymopar.com.
Hope someone can tell me what kinda trans it is and if it will fit a 68 dart.

Thanks