[s1ngletracker]

It looks like you had previously put some polyurethane bushings in the bushing at the subframe interface, and the taboo pieces are just 2 collar halves you weld in place?

My only concern is that the trailing arms don't move up and down in a single plane, they also move in and out as the suspension travels, 2 total axis'. With the solid interface and stiff bushings your suspension might do some weird things with binding/unbinding and might make your handling unpredictable. I really like using rod ends at that connection, no play but allows for free suspension movement.

They also have the added benefit of extra toe adjustment, which I actually needed the last time I aligned my car. It was lowered enough that the stock cam bolts didn't allow for enough adjustment to bring toe back into spec.