You might try lifting the right front tire and checking for any wobble, shaking it vertically and horizontally. I would be inclined to check for vertical movement primarily, looking for a worn bearing, or something close to the wheel and axle.
Bump steering can be checked by standing on the front bumper and bounding up and down some while watching the top of the steering wheel through the windshield. If the steering wheel moves side to side, you do have some bump steer. That's generally caused by the drag link and track bar being out of parallel, which causes them to travel different lengths of arc as the wheels move vertically.
