As far as what the technical term is, drum brakes use "shoes" disc brakes use "pads".
As far as the oil, you will not be able to get it all out of them. You can get the surface to look clean but once they heat up, the oil will come back to the surface. I am not sure if the brake lining itself will separate of fall apart because of the oil sitting in them for so long but, if I were using it on the road, I'd replace them. (should be able to have them relined at a local shop that relines clutches and brakes). My 58 2-ton weighs 8500 pounds empty. I would not want to run brakes on it that I was worried about.
