Torque Boxes vs. Frame Connectors

TrailBeast said

I think the front leaf brackets are outside of the frame on the body.

Chk this out, and notice that the forward pressure is also transfered to the body.
Unless the Barracuda leaf mounting is different.

So in this case the boxes would transfer more of the forces to frame, or subframe connectors.

Click to expand...

So subframe connectors to prevent twist and the back torque boxes (or a similar form of frame gusseting) to keep the stress from the rear from transferring to the frame/body. Maybe the factory front boxes had more of an anti-twist purpose. All I'd ever heard was that the torque boxes were meant to strengthen the chassis. - Never anything more specific.