How to have SetLookAtPosition for head and body differently?

Hi guys, and all the Guru out there.

I have a 3rd Person character whose body is set tracking a certain direction using SetLookAtPosition.

Now i want the head to look in another object independent of the body.

Both targets are always moving, thats why i use IK

Thanks in advance.

Below is my sample code.

 public Transform UpperBodyFacing;

 public float BodyWeight = 1f;
 public float HeadWeight = 0f;
 public float EyesWeight = 0f;
 public float ClampWeight = 0f;

 void OnAnimatorIK (int LayerInd) {

     // Set Spine Rotation
     Anim.SetLookAtPosition (UpperBodyFacing.position);
     Anim.SetLookAtWeight (1f, BodyWeight, HeadWeight, EyesWeight, ClampWeight);
 }