The steering knuckle on each spindle will be in a different/higher position if you swap the spindles side-to-side, which will cause steering linkage interference, and probably other issues. The steering is posable as long as the "tips" of each spindle are not glued to the control arms. The separate steering linkage connects both steering knuckles, so as long as they remain linked, both front wheels will "turn" and be posable.
I would suggest removing the spindles, and reattaching them higher up.