Bars are left and right due to the clocking of the hexes. On some of the aftermarket bars including many of the larger ones from Mopar Performance, California Suspension (long out of business) and others, the hex flats are either parallel front to rear or 30 degrees clocked. These bars can be swapped left to right.

With proper clocking, the t-bar adjuster will be somewhere near the middle of its range when the car is at ride hieght.