What, no blame on ZF Friedrichshafen AG for their royal screwup? :) They're the ones who designed the thing. ZF Batavia was the JV manufacturing plant that Ford bought ZF out of when they fell three years or so behind schedule...
ZF designed it, but Ford specced the materials for it. Same sort of thing happened to the PowerStroke 6.0 - the base International engine works just fine elsewhere, it's just that the Ford-designed electronics that go on the engine in the Ford application are really bad and tend to die.
Good designs, let down by idiot beancounters.