If you're worried about the stands slipping off the LCA's, then just put wooden blocks under them...taller then the distance from the floor to the bottom of the LCA. Jack the front up, shove the block in there and let the jack down. You still keep the bushings in the neutral position and there is no risk of slipping off the stands. You only need the tires off the ground. 1/4"-1/2" is fine.