Ride height is NOT measured at the tie rod ends. You may use the eyeball and then align it trick and if you dont put hardly any mileage on it in the course of the year you'll probably never notice or care enough that it is wrong. I prefer to do it correctly myself and know that my tires will last at least half of the claimed 50,000 miles I should get from them (hard to do when you burn the backs off to often, LOL)
The correct way to set the alignment depends on the year and the body style, but as for the A bodies, car must be on flat level surface sitting on it wheels, you measure the height from level floor to the bottom of the ball joints on lower control arm, then you measure from the ground up to the edge of the adjusting blade (the piece that the adjusting screw pushes against in between the halves of the lower control arm, or as the service manual calls it the "torsion bar spring anchor housing"). The difference in height (spring anchor housing measurement-ball joint measurement=ride height) is the "ride height", both sides need to be as close to the same as possible. Ride height for 67-70 A body Dart and Valiant and 67 Barracuda is 2 1/8" +/- 1/8", 68-69 Barracuda is 1 3/8" +/- 1/8".
Set it incorrectly and you may have severe bump steer, you can cause steering components to hit/bind, cause sever tire wear, make the car difficult to handle, and or a number of other possible problems. The engineers didn't sit and twiddle there thumbs when they designed the suspension in these cars and, if set up properly, they handle VERY well.
I have included a picture of a lower control arm with an arrow to where your supposed to measure to the "adjusting blade" on it.
