1965 Barracuda dash in a 1964 plymouth Valiant ?

Yes it is a bolt in and only issue is wiring. So get the under dash harness from the car you are pulling the dash from. If you have a factory service manual from both you can cross reference the colors and circuits numbers and well before I make it sound harder than it really is. It’s really easy except laying out both harnesses on the kitchen dinner table. Lol. Most partners don’t appreciate it.
Good luck and keep us posted.
Syleng1