var cam_ang[3];

cam_ang[0] = Race_Car.tilt;
cam_ang[1] = Race_Car.roll + 120;
cam_ang[2] = Race_Car.pan - 180;

or

VECTOR cam_ang;

cam_ang.x = Race_Car.pan - 180;
cam_ang.y = Race_Car.tilt;
cam_ang.z = Race_Car.roll + 120;