I saw the link. Those "Rouch prepped" MTX75's are worthless for one. Even the best Ford open diff is still weak in comparison to a Quaife.
And Pete, I think I am TOTALLY justified in asking him if he is on crack when he is saying he is going to put a Ford 5.0L V8 into a Contour, and mate it to an MTX75. That's just plain ignorant!