They have seen engine failure's over and over again.I have just one question.What about all Crown Vic Fords and LTD (ie police cars, taxi cabs?There must be thousands and thousands of them out there with out any problems.In fact my old Chevy work truck has one I installed and it has over 178,000 miles on it.Someone is giving you a bunch of B.S.I am not sure who it is but they are (clueless).If it is the machine shop you might want to look for another one.