Generally the pass. side isn't too bad, thanks to the clearance around the bolt. Driver's side is a different story, there's not much room to get any real leverage on the bolt. If you can find a 17mm box end wrench with one end cut/ground off, that's the best tool I've seen for getting the top bolts off. Get a strong crowbar/pipe, find a good piece of structural steel to leverage against, and use that on the bolts.

(Be careful what you use as a fulcrum...!)

As for the bottom bolts, they're not as bad. Just be real careful you don't round out the allen bolts. Put a scrap of paper towel on the allen head to help take up slack space and give it more bite.

-anthony