Thanks to all for the replies and ideas. I will probably need to go to West Sacramento to find parts stores with better selection for medium duty trucks. 3B, I agree with your Raybestos findings for the front hoses that are about 28 inches long, but my rear hose is about 23 inches, which is longer than what Raybestos shows. I am sure my rear axel and differential are original, but truck has a flat, steel dump bed that might have needed a different rear configuration. It is frustrating to have a maintenance manual that shows all the steps of rebuilding a hydrovac and installing brakes at the wheels, but nothing about the lines and hoses in between.