Raising a wood bed floor questions?

[abadsvt]

Well i thought i asked this before but i didn't get all the info i need so i thought i would ask again. I was hoping to see how all of you guys are raising your wood floor in the bed? I am going to have to raise my bed floor around 5" or so. I was thinking about using some 1x1 square tube and framing out the bed. Something like this rough drawing. I quickly drew this up but you get the idea. I would like to keep the center open because since i am doing a c5 corvette swap i have control arms and i plan on doing a cantilever suspension setup and will have my airbags in the middle. Please all the comments the better.

Josh