Someone here posted earlier of a crank handle they made. He extended the handle quite a bit for more leverage. I think he could have gone into business from the amount of us here that wanted one. I was also thinking of doing that. When my canoe and other stuff are on the roof those first couple of cranks are getting brutal!! I would buy an additional crank and take it to a welding shop for a longer handle, keeping the original for a spare.
I would not use a power drill. These gears are not the most robust and fear they won't last long with that much torque and speed.
FWIW Northstar has come out with a power top on some of their models.