If you are not afraid of a little asbestos, there is nothing wrong with them. They are actually not as hard on the drums as new ones. Drums that have had the old linings can easily be turned. Drums with modern linings usually have to be turned and then the hot spots ground out and then trued. I have a setup to do this, but very few people are equipped to grind hot spots. This is why turning truck drums has become a thing of the past. The new non asbestos linings also require more pedal effort.