9in drum brakes

It takes both tires and brakes working together to determine stopping distance (that and the weight of the vehicle). Assuming you can lock up the brakes both front and rear, they're working good enough and then it's up to the tires to grip the pavement. The problem with drum brakes is that under certain conditions, you can't lock the brakes. You overheat a drum system, you will have fade, where there's no way to lock up the brakes. You get a drum system wet, you'll have the same problem until they dry out, plus you may have wet brakes cause the car to pull severely to one side making you let up on the brake pedal to keep the car straight. With those two issues alone, disc brakes make much more sense safety-wise.