Im pretty sure you dont have to buy upper and lower control arms, wilwood makes conversion spindels, and conversion kit, you can get the spindles out of a 73 and up A body or wilwood makes a 4 piston drilled and slotted disck brake kit for 850 but i belive you will have to find spindles, but you cant put a price on stopping 850 dollars is allot cheaper than 10-20,000 if you destroy your car, just my thoughts