I think there are quite a few extra packages in the image file, Thom. I was able to cut quite a bit out when I moved the 336 image to the 360. I'll admit that I did it mostly accidentally, but I did end up with significantly more free space. The thing isn't on right now, so I can't get you a package list from work. I'll get it tomorrow night if you'd like.
Now, I'm not sure if it's enough free space, but it might give you a better chance. I'm not sure how much I ended up with off the top of my head - it's been several months since I looked at it.