Quote:
Originally Posted by factorystock
Looks like you are re writing history a bit. We will define medium duty as the 105" conventional cab with large front fenders and running boards. The 3500 was the lightest '63-66 GMC medium duty truck ( 10,500-20,000 GVW). The 4000 was available in the 15,000-24,000 GVW range. Many front and rear axles were interchangeable between these models to give similar GVW's, yet different series.
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forgot about that 3500 series. I did have a 3500 but it was a 77 and up here that nbr was used for a 1 ton
all the medium had options but not trying to rewrite history; we can't with you around
ron