Floor pans for a 65 barracuda 67's will it fit?

Like the other guys said you can use Valiant floor pans because a '65 Barracuda is technically a Valiant. I am unsure if the floor pans fron a Dart would work because they have a different wheel base (106" for the Plymouth & 111" for the Dodge unless it is a wagon then it has the 106") and I don't know were the added length comes from, I guessing the rear floor pan.

Chuck