John, What is the number stamped into the casting sitting next to your steering box on the red stool? The number on the part I have is 594460-_ _ (I am not too sure about those last two digits, but they look like an 'I' (as in India) and a '4'.)
Nick 1940 KC Model 1/2 Ton Pickup Project (with '37-'39 Bed and what we think is a '42-'46 Frame) Taos, New Mexico