True, you cannot change the locations of the rear spring mounts easily, but if you turn up the opposing torsion bar, the rear will level its self out.

The XHD springs are a stock Hemi replacement part. They are designed to OEM specs for ride height. They do not provide lift, but do provide torque control. What a lot of us tend to forget after 30+ years, is a lot of mopars did not have a rake from the factory, but instead were more nose up in attitude. This is why the perofrmance manual alway suggesteed altering the ride height for a nose down rake.

Don't beleive me, next time you watch Vanishing Point, notice how the car sits.