This rotor is better than the original and has improvements to handle more heat. We add slotting to improve rotor life. The slots sweep the pads clean, allowing the rotor to run cooler. This can be bolted on to rotor diameters as large as 15. This same rotor hat is used in racing to reduce sprung weight.
Front brakes can only do so much.
Most rear drums do very little for stopping power, which is usually why they last 2 - 3 times longer than the front pads. Many muscle cars had upgraded rear axles as well as larger front spindles. This is due to engine size, suspension upgrades and even mid year model changes. All domestic models have at one time or another experienced this situation. Older vehicles, street rods and muscle cars also may be modified.