Anyone swap HVAC unit from donor?

Thanks for taking the time to comment! This is exactly what I want to do! I just found his build online, he did an incredible job! I can't find any dimensions of the Ram 1500 heater box online, I'm going to head to the junkyard and see if they have any pulled to check measurements to see if I can tuck into 64 Cuda area. Do you think the Dart and Cuda have similar space behind the dash? In photos it appears the Dart dashboard is a little larger in depth, but could be deceiving.

Was a member here, can’t remember his name for sure. Something like Badass71

He did a magnum swap into his 71 Dart and used the complete heater/AC system out of a dodge ram truck, which was the doner vehicle. He used the under dash unit, the under hood stuff and the ram heater controls as well.
If you look far enough back in the magnum swap section you should be able to find his thread.