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I replaced the crank handle with a bolt to use with a drill. I think reversing the handle might work. Pop the metal cover off the top. You'll see two gears - one horizontal and one vertical. There is a small pin behind the vertical gear that goes through the handle. I'm guessing you can remove that pin, then move the vertical gear to the rear plate on the jack with the handle now at the rear.
I just remounted the jack 180 degrees. I unscrewed the original bolts, swung the jack around 180 degrees, you will have to re-drill the bolt holes and use nuts but it was an easy mod.