completely adjustable on the rear...it's the camber that isn't...
Not to confuse the issue, but the adjustment for the toe will change the camber,
but it will barely be measurable.
All the way in (toe out), versus all the way out (toe in) only changed the camber by 1/4°.
Check the following pic:
Those two gold colored eccentric bolts in the center of the lower crossmember are what's used to adjust the toe.
(Shown on either side of the 2X4 on the jack plate)