Weld subframe connectors loaded or unloaded?

Going to bookmark this thread as it’s a good point of reference.
I think the only way to get back to that point is to completely gut the car before doing any stiffening.

For a backyard build, I guess no drivetrain, front sheet metal or front/rear bumpers would be a close approximation?
This is what I’m opting for - nothing more than front and rear suspension, sat on its’ wheels. (Up on cribs)

Would completely unloading the torsion beams have any discernible impact…?