'Not aware of any particular months/VINs to avoid ... but, as a general rule, on a "limited production car", the "odds"(?) would seem to favor buying a later production car 'cause any pblms the factory might find would tend to be found earlier in the "run". Also, the more cars built - the more expert the assbly people get in doin' what they do. But, that being said, I've not seen any MASS of '05 owners on this site who've declaired THEIR car to be a "lemon" either! So, there you go! Ford seems to have had this car pretty much "right on" from the get-go. They DID make some changers "early on", but those arn't an issue.
'Suggestion? (And don't take this as "meaning" or "being" anything other than what it is MENT to be - just a straight forward suggestion.) If what you're MAINLY looking for is PERFORMANCE, and you think you might have a budget constraint situation buying a GT, why don't you take a real close "squint" at the new 427 ZO6 Corvette before you buy anything??? Seriously. They are DARNED CLOSE in performance to the GT and you can buy a NEW one of those for half what even a used GT will cost ya. And - BINGO - budget be darned! You won't even need to think about that messy topic! Write a check, 'car is yours, end of hastle!:biggrin
But, if you're dead set on a GT - PERIOD - for whatever reason, then forget I even made that last suggestion!:lol
Good luck, Sir.
E.P.