I would think you could just ignore the diff ABS sensor and ring, can't see how it would hurt anything if you leave it in there. Might be worth checking with Jerry though.
But...I can't remember - does your VX have 4.56 gears or 4.30? Jim's Trooper is gonna have 4.56...if you don't mind setting up gears I guess it is no big deal either way.
email coming your way in the next hour or day...so as not to get this thread too far off topic.