The truck is one of the Holden modified Aussie Airbourne GMC's as well. Good find as I missed this photo during my search for photos of the Aussie Airbourne GMC.
I would say the crane set up is a field modified job probably when the cranes regular mover either packed a sad or was destroyed before the war finished. It could even be a piece of Japanese equipment modified for use.
__________________
Cheers
Cliff Hutchings
aka MrRoo S.I.R.
"and on the 8th day he made trucks so that man, made on the 7th day, had shelter when woman threw him out for the night"
MrRoo says "TRUCKS ROOLE"