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Old 06-21-2016, 11:18 PM   #5
60-66 Nut

Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,062
Re: Swap TH350--->700R4????

With 3.73's and the TH350, I would run at least a 235/75R16. On my '68 C10 with a SM465 and 3.73's I was running a 235/85R16. I don't have a working speedo, but at aprox 55-60mph the engine is turning about 2250.

Originally Posted by angelobackwards View Post
Thanks for the advice. What size tires you think I wld work better if I were to stick with the 3.73? Thanks again
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