Radiator / waterpump question

I have silly question in my 65 Dart the current water pump and radiator are on the drivers side. (Which blocks the timing tab, and sound like the bearings are going, also has a small bypass hose.) I would like to swith the water pump to one that exits on the passenger side. If I do this do I have to replace the radiator, or can I just get a longer radiator hose?