Whats my 727 Transmission out of?

[mopar367]

I have an old 727 I got with a 383 from North Bay, it has numbers by the pan was wondering if anyone could tell me what it came out of? I am going to rebuild it and JEGS says the trans rebuild kits are different for the early ones.
The numbers by the pan are 3515845 3521 6837, and on the bellhousing in large letters it says 433-7. Any help would be much appreciated.

 

[64SF]

This may help.

http://www.mymopar.com/downloads/transguide.pdf

 

[mopar367]

According to the guide it is a 71 or a 72, could be out of a challenger or a barracuda, Thanks 64 SF