[strictlypersonl]

If your differential is solidly mounted to the chassis, the only way for trailing (or leading) arm to work properly is to anchor it in-line with the lower control arm pivot. Otherwise, you get bind as the suspension moves up and down. Some kit (I forget which) used a leading arm. But that still allows a little motion from the lower control arm twisting. That is one reason why the ERA reinforces their Jag LCA.

One possibility is to use a trailing or leading shock (like a Mustang Quad Shock) that attaches somehow to the hub carrier near or above its axle centerline to dampen out the front-to-rear motion of the system. Unfortunately I don't think anyone makes such a system.