Does your truck have 8 or 6 wheel lug bolts? If 6 then it is a 3/4-ton Light Duty. See the links below:
http://www.stovebolt.com/techtips/art%20deco/index.html
http://www.stovebolt.com/techtips/tranny/bonds/index.html
If it is a Light Duty then the spindles, king-pins, bearings and brakes are the same as 1/2-ton.




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