Great idea blu808, that camaro looks amazing, awsome fab work.
Heres my first project I decided to tackle last year when I was 16, my first time welding/fabricating. Its nothing compared to the other projects but I figured I'd contribute to get this thread going.
It is bolted to the floor, I know not a good spot but there was no other easy solution. I'll be taking it out to paint it soon, when I do I'm going to re-inforce the floor mounting point, redo some welds and maybe extend the uprights around further. The sheet steel is 11 gauge, and the tubing is 1", 0.095" wall steel, $30 for all the metal.