If the leafs are not removed both at the same time, and the bushings replaced one side at a time, I don't see how the car could collapse. That said, I never did it this way. I usually put the car on stands both sides, remove both front wheels and work with best access on the linkages and leafs. One cannot lift one side at a time as otherwise the sway bar does its job and the space is too big to reconnect the linkages.