I just went and measured. My tires measure 45 1/2" inside to inside, so it looks like there is 8" more to gain, or 4" to each side. That will add stability, and with all the hills and ditches around here every bit helps. It will still only give me about 8" from the front plow bottom to the inside of the tire.
The stabilizers on the tractor have oval holes in them that allows for some side to side movement without letting the implement go too far (into the tire). The plow seems to be tracking behind the tractor well as there wasn't any noticable difficulty steering nor was the plow trying to steer the tractor. I didn't get the chance to try plowing with the stabilizers disconnected today, but hopefully will tomorrow.