Your dealers allotment, what you ordered, what it has on it, and the
number of the same thing being built will all affect the date. No, the
vin is not available, you should be able to follow it through your
dealer. Your order may or may not be "in", depending on the queue
allowing the order to drop. Again, the dealer can give you the
information as he gets it but there is no way they will hit the date
you think they will. They can give you a date one day and come up
short 5,000 wheels like you ordered the next day. One of mine came in
2 weeks, a fluke, another took 5 months. Also it can take 3 weeks to
ship. If your dealer is a straight up kind of guy he can give you a
pretty good guess as to when they "normally" get their Corvettes.

VIN is assigned before the car is built, the dealer should be able to
get it for you as their manufacturing status system is online. My dealer
had my VIN in hand a couple of weeks before the car was built.

-- V