Hello,
There is one of those AEC preserved at Duxford. It doesn't have the crane fitting though.
A friend of mine called George Moore and I had a good look at it recently, and George took a lot of dimensions off it.
George is an extremely good scratchbuilder of models.
His model can be see at the following website.
http://www.network54.com/Forum/11074...ge/1132922387/
As this truck has got to be one of the fiddliest trucks ever built, George was obviously a braver man than me to have tackled this project.
Regards
Nick Balmer