Sorry, I don't have a worklog. This was my first time building something like this so I was going on trial and error throughout the whole process. I basically determined how big (LxWxH) I wanted it, added my racing seat and went from there.
These were the only pictures I could dig up, if you want something specific I can take it for you.
View from front
Mounted Shifter
I removed the pedals from the Logitech base and mounted them inverted for a more realistic feel and to make it easier to heel and toe:
Pedals
The dimensions are 67"L x 36"W x 28"H.
Console height from cockpit floor is 14"H
Edit: I've had the wheel since around February of '07. It's seen heavy use (I play rFactor, Richard Burns Rally, GTR2, Grid, GTR Evolution, Dirt......) since then and it still works the same as it did when I first got it.