Dave
If you don't mind me asking, is it for a track car or your road car?
This pedal box means the complete removal of the original braking system. This wouldn't be a great idea on a road car. I'll send you a photo of the engine bay showing the master cylinders and reservoirs and pics of the pedal box separate.
If it's of any use to you, remember you will need to buy two master cylinders and all the new hoses and connectors. I also have a couple of brand new AP reservoirs here.
you will probably end up spending near to £200. (not including the £75 pedal box).
cheers
Kenny.