I just installed an adjustable track bar on my 01 3500. What's the easiest/best way to center the front axle. They gave me a flat bar to hold to the control arms and measure to the frame, but I must not be measuring the same spot on both sides or something, axle is to far to the right.

 

I would measure to the frame from the rotor at tdc or from the center of the ball joint to the frame on both sides? Any measuring needs to be done with static weight on the front axle as any droop causes the axle to pivot on the track bar, forcing it off center.