What fits>

I have a question for you all. I have a 1968 Dart GT with the factory disc brakes and 14" steel wheels SBP from the factory. I just bought 4 brand new 14x7 Cragar ss wheels for the car. From listening to all of you it sounds like my wheels are not going to fit on my car. Would I need to go to a 15x7 wheel or will the wheels I have work for me? Appreciate any help on this, Thanks Brian