Must be completely mad to let GGR map your car, good luck your gonna need it!!
If you really value that engine then get Stu, Karl or Ahmed to map it.....
And dog boxes are sweet, got some good memories of driving Bruces car. Only thing that made me poo my pants was how close the gears were together, so much so that I would slow down a little before attempting to go up a gear as I could not afford to buy Bruce a new engine!!LOL