swapping 225's

Does anyone know if the following motors can be swapped? I have a 68 Valiant with the engine numbers 2463430-13. A guy has a 73 Duster with a motor numbered 2806830-3. Can I swap my slant for his without major reworking to line everything up? He also has the 904 tranny to go with it. So i can get both pieces to put in my Vali68.