I have 4 different C20 trucks. 2 are 1970 127" wheelbase trucks. One has a Gross Vehicle Wieght Rating (GVWR) of 6200#. One has a GVWR of 7500#. 1 is a 133" WB Longhorn, also a 1970, and its GVWR is 6600#. Then the '72 Sub I have has a GVWR of 7000#. As you can tell from this mess, the 20 means nothing. Actually, it means quite a bit but not how much load you can carry. My 7500 GVWR truck is a 402/TH400 and weighs probably about 4000#. This gives it a cargo capacity of 3500# if you get it spread out right. Considering a ton is 2000#, that makes my "3/4 ton" truck rated to carry 1 3/4 tons! What's up with that? Look on your data plate to see what your GVWR is, their is a max number for the platform and another for your vehicle "as equipped" from the factory. It's not how much the vehicle weighs, but the TOTAL capacity of the platform including truck, passengers, payload and fluids. Actually load carrying capacacity depends on tires, shocks, brakes, axle ration, transmission, frame rail thickness, and the list goes on. Just know that 20 series trucks went from about 5500# to 7500# for the platform.
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70 GMC 3/4 ton Sierra Grande 402/TH400
72 Jimmy 4WD 4spd 4" & 35's
64 Corvette Coupe
68 Camaro 'vert TPI & TH700
69 Z/28 355 12.6's @110
72 Datsun 240Z-ol' reliable
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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