News:
YES..100% it will fit !
they were all interchangeable with all years and models 70 - 74!
Not sure about a barracuda, but with a Challenger, the lower dash plastic pieces will not match up though. You need '70 plastic to match up with a '70 pad. '71-74 plastic to match up with a 71-74 pad.
Never heard the yrs wouldn't swap, I remember trading a 70 Challenger pad to my friend for a 440-6 manifold.He put it in his 71 Cuda, look great even with the Challenger script.