One can buy Z06 body parts and this one needed the widened rear quarters of the Z06 for how much power is being put down. Front fenders are wrong also as the Z06 has more pronounced side vents for added engine cooling. Plus if this was really a Z06, they would have said it in the caption.
andrew: yea who cares that it's not a Z06, but if it was a Z06 for the base then it would mean that it had got the Z06's aluminum chassis.
if it was a Z06, it wouldn't be able to handle much boost. the LS7 has to go through quite a bit to handle any kind of worthwhile boost level if i remember right. i read an article somewhere about how it's a relatively fragile engine as far as FI is concerned.