Hi there.
Tracking will not resolve a car that pulls to the left. It will cure uneven tyre wear. You need to get a 4wheel laser alignment done. Problem here is that the ZTs (and R75s) do not have an adjustable camber.
Some points to consider. If you have self leveling rear suspension (as its a ZT-T) make sure there is nothing in the boot. Also, make sure you have a full tank of fuel. This is VITAL as the front camber settings are taken from the measurements of the rear wheels.
Little fuel (or half a tank) will cause the front tyres to be set up in line with the rears which is fine, but then when you get a full tank of fuel in you'll find the car wandering again.
With this done, get the car alignment checked and see the results. The the fronts are out you may need to do what I did.
Drop the 3 bolts on the drives side suspension (for a car pulling to the left), and increase the diameter of the holes marginally that the strutt comes through. By doing this you are now giving your car the ability to adjust its camber. You can then get the front wheels aligned 100% accurately. Repeat if necessary on the other wheel.
Also, one other thing, make sure ALL tyre pressures are accurate before having alignment checked.
Hope this helps