My thinking is maybe a 3:42 but only because that tends to be a good all around gear.
But I'd suggest you get your trans gear ratio's 1 thru 4 and find a online gear calculator (I've used American Powertrain) and plug in tire height and different rear gear ratio's to see what your rpm's are at different speeds. I'd think you probably most concerned about your highway cruising rpm vs speed.
This is what I do when considering gear changes.
Mike
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