Interesting, If it continues doing that I'll be ordering a shim kit I suppose!
Yes, the front is narrowed, if I remember correctly it is 7 inch total narrower, or 3.5 inches on each side. We basically narrowed it the amount that a mustang 2 would bolt in and be the correct width where the tie rod ends pivot on the inside, (inside the boots). The rack is a Flaming River mustang 2 power rack.
The rear is stock vette width, that's why camber is needed to get inside the fenders even though the fenders are 2 inch wider. A corvette is wider than it seems!