I think this works like 2-link suspension (with none of the anti-dive properties of a 4-link?) except that the angled upper links provide diff-centering, so no panhard bar is needed to center the diff. 2-link/ladder bar is OK with limited travel or with long links. Not so good for off-road or street driving
makes it easier to fit to the body, as there are only two mounting points
For photos of one installed in a drag-racing 1200, see Bezman rear axle