The ride height on our A-bodies is specified as a difference between the lowest point of the LBJ and under the flat of the ride height adjusting spoon. .... IIRC. I don't recall the number but it has a narrow window.
By doing it this way the camber-change of the cycling suspension, will better stay in spec with various different height tires. So bottom-line is that bumper height has nothing to do with it.
Oh, I guess I should mention; our Mopes have un-equal length control arms, so then, as the suspension cycles up and down the camber changes, as a function of that difference. And because of the way the steering is designed; when the camber changes, so does the Toe-In. And when the toe-in changes while traveling dead straight, the car tends to Wander, and follow ruts, making it feel nervous..
You might think that making the control arms the same length would solve this.... and you would be right..... But that introduces a new problem, namely tire scrub, and instability in the turns.
During the up and down travel of the body relative to the center of the wheel, there is a narrow window, by design, in which this camber change is minimized; and the ride height as specified, seeks to keep it there. Loose shocks and pussy T-bars aggravate the possibility of staying in the window.
When things go bad, hitting a bump in mid-turn with the loaded wheel, can be an unsettling experience, as the loaded wheel attempts to self-steer.
Consult the book.
It might be 2.375, I sorta remember that number.
