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Pretty sure the HO72 dually axles will have 3" shoes and supposedly they are harder to find. Don't know haven't needed to do mine yet. I would pick number one because of the better brakes and axle ratio.
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86 Silverado C10 back to 305 power!
67 C30 Dually Dump, with 350 transplant, Rockhauler
05 Duramax 3500
"If at first you don't succeed, try a bigger hammer"
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