Not familiar with the 737 but the 747 rudder pedals are coupled to the steering control system. Full rudder deflection provides about 10 degrees of nose wheel steering as against of 70 degrees tiller authority. Should be enough to vacate the runway at a high speed turnoff with rudder steering only if the right hand tiller is not fitted on QF 737s and if the system design is similar to the 747?
Eclan, you have beaten me to it.