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Re: 3.73s with 35s 72 K10 Th350 Auto & stock 350?
My 76 K10 350/th350/30"tires tows 6000 lb trailers with 3.08 gears and I don't need to downshift for hills. I wouldn't worry about the downshifting aspect.
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76 Chevy K20
76 GMC K15
77 Chevy C10
77 Chevy K10
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