Looking for some Differential advice

MidnightSwinger said

3.23 vs 3.73 @65mph with your chosen rear tire size.

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3100 isn’t terrible I know the stock gears aren’t gonna cut it. I just don’t want to overbuild it. I feel better seeing the difference between the ‘23 and ‘73’s. It’s not gonna spend a lot of time on the freeway.
Thanks!