Hi Paul,
I have a GTD with KVA body. You are welcome to have a look and take any measurements you need. I am in the Oldham area so not too far. You can contact me via Email:
goutmeister@hotmail.com. Also I will be at the GT40 Enthusiasts club meeting this Wednesday (4th) at the Whipping Stocks, Stocks Lane, Over Peover, Knutsford, Cheshire WA16 9EX at about 8.30pm if you can make it.
Cheers
Mike