If you have a Vega cross steering setup, you need a Panhard rod. Without it, when you turn the wheel, it will put sideways pressure on the passenger side front spindle, and instead of the spindle pivotting in the bushings at the end of the axle, the whole car will move in the opposite direction to the force applied to the spindle, while the front axle doesn't move. this is because the shackles can rock enough to let it happen. a Panhard rod prevents that. Also note that the Panhard rod must be anchored to the frame on the same side of the car that the Vega box is mounted on, and anchored to the axle on the opposite side of the car.---Brian