My problem was that I didn't have an impact driver, electric or otherwise. Another member here (VXorado I think) told me about the breaker bar against the frame trick. I was a little creeped out about it, but it worked just fine.
But, yes, and impact driver would be the way to go.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless