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Re: 1970 C10 Rear End ID/Help/Advice
It's a 10 bolt out of a later model. No telling what's inside. Pop the cover off and look for the number on the ring gear. 2.76 and 3.42 were very common in these if you think it highway friendly.
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1972 C10 Cheyenne 402/TH350
1985 GMC 1500 Sierra Classic 350/700R
1986 K20 427/NV4500
1986 K20 Sub 406/TH400
"Life's tough.....It's enough tougher if your stupid." John Wayne
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