Duster rear end dolly ideas

Not sure if this is what your looking for, this is the approach I came up with that allows me to raise and lower the car but continue to use the support points that the springs provide so the body doesn't move or sag when I removed panels. Also by flipping the casters out of the way it sits solidly on the floor and won't move around. Might be a little extravagant but actually not that hard to build.