Thanks for the links suruk. Will look into these over the next few weeks.
I think I have sorted the clutch clearance issues. Hopefully I will try fitting the box tonight with positive results.
I have attatched a link of footage from Wakefield Park. Its a great example of how 'not' to set up your car.. At least the times were encouraging.
http://www.youtube.com/watch?v=lhJJ6bcxbNw