You will also need custom suspension to clear the brakes. The weight factor is another issue as well as increased hydraulic fluid will make for a softer pedal. The brake hydraulic bias will alos be off.
Another point I forgot to mention was the fact that this would be essentially useless on a street car, because this set up would most likely out-brake any street tires out there. Maybe road racing tires could hold up, but otherwise I think it would be futile.