Mine was one of the last 03, built in Feb03. Never raced it but with a blower and lots of mods.
I thought mine wasn't part of the softy batch when I redid it recently to 31T but it was starting to have a problem at the right bearing seat at 53 000 klms (~ 35 - 37 000 miles).
Kind of hard to judge: 28T get upgraded everyday on older 5.0 Mustang and they have almost 1 000 pounds less weight to carry and almost 275 less crank HP to throw at the driveline. You just have to compare the Mosers 31T to the stock 28T side to side to start wonder: The stock ones looked so weak, i was glad they didn't break before.
IMO, even NA, these Moser puppys are what the Panther platform need to have some kind of a cushion. Ford seems to agree since I think they had upgraded to 31T from the factory now. They probably did it through the limo line part bin, which is still weaker than those Mosers but better than 28T. Don't wait until they shrapnell in the case and don't bother about warranty unless you married the dealer owner daughter ...