How did this happen? Hard cornering, over rev, low oil level, oil pressure warning light, etc??
If you are under 100K miles with oil level & maintanence up to spec & you have no major engine mods, I think you should seriously go head to head with Ford/SVT about picking up some or all the cost of the new motor. It just should not happen and Ford knows this. I think some have been sucessful in this type of situation.