[DGthe3]

I'm 99% sure that the Z/28 LS7s are going to be built at the new performance engine line in Kentucky. That plant starts up within a month or so of when the Z/28 goes into production. I've also read that GM is looking for a few thousand Z/28 sales per year, and it would seem very strange for them to have stockpiled thousands of V8 engines. They adhere to a policy of 'just in time' production, which means that most major components sit around for a matter of hours, not months, before getting installed in the car.