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Old 02-03-2021, 10:05 PM   #10
Mike C
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Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
Re: 3.73s with 35s 72 K10 Th350 Auto & stock 350?

3.73 and 35" tires are a great choice with a TH350. Same setup we did in my kids Jimmy. And if you had a manual trans you'd probably like the 4.56.

Based on your description of use, I'd go with the 3.73. On my kids truck we also did a 204/214 cam with an Edelbrock intake and dual exhaust on 2.5" rams horns so a little more power than stock.

Converter slippage is a factor making 3.73 and a TH350 almost same highway rpm as an sm465 and 4.10 which is my favorite road combo.
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