I am gathering information on Medium Duty trucks that comes with hydraulic breaks. Do any of you own one or have access to a Medium Duty truck with hydros? I do not care if it is a Ford, GM, International, Mack, or what ever. I want to know about the breaking system and if it has rotors or drums and the lug pattern. I am interested in hydraulic disks on all four corners and the component break down. Photographs would be a huge help as well. I also would like to know about a good online source I can get price and availability from. Oh, and feel free dumb it down for me.