70 Dart Heater Box Same As 68 Cuda?

Were moving (major suk) and I’ve been holding onto this heater box from a non ac 70 Dart as the one in my non ac 68 Fastback has some minor issues. Are they interchangeable or should I donate it to someone who can use it? If I end up keeping it, it’ll be e beyotch to pack so the movers don’t f it up. Some one lemme know