Well maybe Ford will warranty his low mileage motor then. Top notch parts are only part of the equation , if your in business to sell them/install them / tune for them then and your work is shabby then you should pay for it if it was not the owners fault within a certain time frame. Most reputable shops give 12/12 warranties on parts and labor and it's no different than calling the guy back out who supposedly fixed the leak on your roof . He said it would not leak for a year yet it does so he has to fix his shabby work . So I think your WRONG!!.
Where was it said that anyone's work was shabby? I did not think that had been determined yet. I agree with what you are trying to say but until the root cause of the failure is known the finger cannot be pointed anywhere with any degree of certainty. Where you are wrong is to expect a motor to be failure proof just because its been done before. I have seen budget motors make big power for longer than they ever should have and survived... and I have seen big dollar motors break on the dyno before they ever seen a lap. Both are perfect examples of "shit happens"!!!