Food for thought.
There is today a mad rush for people to convert their old vehicles to disc brakes without really researching the differences first.
Disc brakes are definitely superior in an extreme heat environment,namely racing.Drum brakes are in fact superior on normally driven street vehicle.Upon a first panic application,the drum brakes will out stop the discs every time.The only way the discs are better on a street driven vehicle is if the driver is someone who maybe shouldn't be driving in the manner he or she is driving.Drum brakes are lighter.Disc brakes are cheaper and easier to build,which is the main reason all manufacturers install them on cars,light and medium duty trucks.Heavy duty trucks have gone completely back to drums after trying discs for a few years and discovering that they just do not stop as well as drums.
It is much easier and cheaper to simply keep your drums in perfect condition than to convert to discs,unless you spend most of your driving time on a race track.
As I said above:a little food for thought.

Paul,
Boonville,MO