Looking for workshop manual on 1937 Oldsmobile 1 ton Truck/Utility with 230 Olds motor. My truck was built at Holdens in Australia. I believe GMC is the same? Oldsmobile truck manual, 1937: truck chassis models C112, C126, C131, C157< F130, F155H, F155L, General Motors Corp Export div. Any advice where to buy helpful. Percy1939