Need help changing draft lines

Need some help from my fellow brewers. I was a bad brewers and neglected my beer lines and want to replace them. My issue is there next to no room between the two top nuts to get a wrench on them. Here's a pic to explain what I mean. The only thing I think I can do is try a 1 1/6 wrench to get those off. But they are $30+ dollars so I wanna make sure that is definitely what I need before I purchase one. Thanks for the help

http://stores.kegconnection.com/Detail.bok?no=167

This is what i bought in order to get in there. Works well.

Looks good and reasonably priced thanks

Why do you need to get the nuts off? Those are barbed... why not just pull/cut the lines off? Then, to put the new lines on, just soak the ends in some really hot water for a few minutes to get them loose and wiggle them on with a pair of pliers.