The changes on the GT have been mostly evolutionary and to address issues that have cropped up. Most have been production assembly type items, i.e. making sure the A/C duct soft tubes are not crushed during instrument panel installation, some wire harness install "goofs" (that are found IF the dealer does a full chassis prep, i.e. hooking up power to a roller and testing all circuits) and the weathersealing improvements that have been made. These are the steering shaft to tub seal and the weatherstrip "blocks" at the bottom of the "A" pillars, etc. Again, nothing that can't be done to an early chassis.