You guys going through all of this trouble to fit a 3.46 rear end is kind of ridiculous. You will not even notice a difference, hardly. You'll be kicking yourself the second you drive it, wondering why you spent so much time and money on such a low-yield mod.
Just get the 3.73 and be done with it. The rear ends are readily available and bolt right up. Cruise down the highway in 5th gear for an approximation of your new top end - I bet most folks would find it very livable.
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