Measuring ride height

Ima thinkin that method would only work with oem T-bars, cuz any other bar might result in a different ride height at the same blade measurement.
I put it into my memory banks years ago that it was the vertical difference between the center of the T-bars and the centers of the LBJs. That works for all bars.
But think about what this spec does; it attempts to put your front end in the center of the camber curve, that minimizes bump steer due to camber changes when the left and right sides of the car are at different ride heights; as in a turn, or bumping over rutted roads. Of course this all goes out the window if your strut-rod bushings are like jello.