Ive got a Transit as well, nice and square in the back ideal for the job!
I have a bench running down one side with my key machine on it. Its worth thinking about a dual machine that cuts cylinder and mortice keys as this can save on a lot of space. Under the bench is a shelf with compartment boxes that i use to store all my key blanks. Under that i store all my cases, morticer, drills, etc
The other side of the van has racking for all my stock and a roller cabinet for my non essential tools. You can get cheap roller cabs from Ebay that with a bit of creative bolting can provide excellent van racking. Just remember to take the wheels of !!!
I will try and post a pic as well if it will help you out. But you have got to decide what will work best for you. Every Lockie van Ive seen is different !
