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    73 C30 Dually Wheels/Tires

    I have a 73 C30 dually that has the original 7.50x16 LR D bias tires and wheels on it. I have been looking in wrecking yards for tubeless rims to install on it. All the used GM rims I find have 1/2 inch stud holes. The studs on my 73 are 9/16 inch. Did this change with the 76 model year...

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