Wasn't there an experimental C60X tractor built as well? Was it Australian?
We also used other Canadian and British tractors including the cab 12 7A2 tractor, the Guy Quad Ant, Bedford QLB (similar to the No 6 CGT, which had the cab designation WO78).
I'm also provisionally saying WO93 was either a No 8 or No 9 CGT
For more info, see
The Chevrolet WO Database