I don't want to be insulting by asking a International Harvester question, but you guys know trucks! If its any consulation I do have a 81 GMC 6000 ramp truck named Ol'Ugly. The IHC is a 72 1700 Loadstar. It has air rear brakes and hydraulic fronts. The brake pedal is air. The system is said to be stock. I'm used to one or the other. I really like the truck, but to keep them going with a normal system is hard enough, let alone something weird. Any thoughts?