I bought mine through snap on, Blue point part number ANS1938 its a 2 3/4 inch socket i have seen them at Napa if you dont feel like tracking down a snap on guy. Some also use a four prong style nut, i got this socket at auto zone, number 2-3/5.
I just went through this recently my 350 had auto-lock hubs. I found one at Oreillys for the auto hub nut. Performance tool W83246 2-3/4"6R. Switched to manual hubs then I found one for the manual hubs at Napa. Evercraft 4-Lug Spindle Nut Socket 776-9027. Hope that helps.
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