i was messing around at my work when i worked at autozone and i decided to pull the front rotors from a stang and our cars and noticed that all i had to do was change the hub for the front to get the bolt patter but if i was to find a bird with disc ar the bone yard and change the wheel bearing is it the same thing or would i need to change the caliper and stuff to make it work. i have read the direction on her but i am kinda unclear on them so does anyone know if the rotors are the same size like the front ones were