Using LX (New Charger/Magnum/300) Wheels on a 74 Dart

My 5x4.5 rear end out of a 73 duster is a 7 1/4. It was a disc brake car so it had the 5x4.5 pattern but still only had a 7 1/4 rear.
That looks good though, what size tires are on that 67?