How to I.D. '71 440 engine

Hello,
I have a '71 440 engine and Trans and I am trying to figure out what car this originally came out of.
I was told it was from a Challenger, but I think it might be a T.N.T. motor out of a Chrysler.
The number on the oil pan rail is 1C154672
Any help would be appreciated.
Thanks, Jeff

no challengers were built a plant code c, jefferson.

Jefferson built Chryslers and Imperials.

Thanks guys,
Your help is greatly appreciated
Jeff