I'd start by lubing the front end if it has fittings, I know many OEM joints had no fittings but aftermarket ones did. Jack up the front end and then turn the steering wheel with no resistance on the wheels. You can also disconnect the steering links, jack the car up and turn the steering, if the box has issues, it may make noise, if not then turn each wheel and check for noise or resistance. Does the noise stop if when you turn the steering wheel and hold it turned? While the car is going around in a circle?