I want to up grade my 69 3/4 ton to a dually rear,for towing. But I cannot find a 67-72 cab & chassie rear. So I got a later model dually cab & chassie but its wider. Now after talking to moser axles,I plan on narrowing the rear and adding moser axles. What I need to know is the 67-72 dually width measurement. I am sure its not the same as a 3/4 ton. Does anyone know the width of a 67-72 cab & chassie 1-ton dually rear ? Or were I can look for the answer.