I say the opposite. Autos need gears worse than manual trans. Think about what you are spending on the gear change, and think about a power mod. A supercharger would make a huge difference.
I say pay for everything else and drive for a while with the 37s and see how you feel.
I drove 37s with 4.10 for a long time. Then i thought 4.88 was too much when I changed. But we do a lot of highway driving in the northeast.
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