Wayne,
Yes Len does have engine sump and fuel tank guards. It also has the remnants of a six digit SA numberplate on the front that I can just make out the SA prefix and most numbers.
I would be chuffed if it did spend some time at Woomera, its name is course is a reference to the one and only Len B who spent so much of his life in Land Rovers out in that part of the country.
I have scratched around the edges of the hole in the block with an engineer's scribe to try to find remnants of a thread, but no trace could be found. It would essentually require reaming out to a larger diameter and recut a new thread, or pursue the welsh plug option. My concern with a welsh plug is setting the plug with no shoulder in the hole to tap it against. I don't really want to have to think about trying to retrieve a welsh plug from inside the water gallery!
Also for the experts, are the bolt heads etc on Len going to be AF etc or Whitworth sizings?

