http://67-72chevytrucks.com/vboard/s...=1#post6578622
I don't want to hijack this thread so I will just post a link to my build where I just put pictures of my proto-type box with 2 1/4 cubic feet. It is wide and high in order to get that much volume. But I think it works. Let me know what you think. It's an evolving project, so suggestions are welcome.