Buy the time you add the good parts to the car its 11K more then the price you posted,so now we are at 90K for the Z06 and it added 225 Lb to the car.
Edit: to get the Z07 package with the CC brakes you need to also buy the Carbon Fiber Ground Effects package with enhanced aero, and its 3K, and last the sport seats and we know that will be more.
http://www.autoblog.com/photos/2015-...6-order-guide/