Interesting. If you plan on driving around 58mph, then at that gear ratio you'll have the most wheel torque possible at that speed. The problem is that you'll have the same amount of wheel torque clear from start. If you had a 2:1 ratio before the differential, or an 8.88:1 diff, then you'd have about 2/3 the total wheel torque at that speed but at lower speeds you'd have up to double the wheel torque.
Another "option" would be to use the smallest rims and tires possible. That would effectively increase the force exerted on the pavement by the wheel. Just be aware that your brakes would be more touchy if you did that.
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