I interviewed a former B24 pilot today. He's in his 90s now and told me about his war exploits.
He also showed me a book he had made of his life, and one page in particular caught my eye:
He was the last on the 'bus' on Fraser Island and had to sit next to the driver. The truck had no doors, and after the driver missed a gear change (it had no brakes) it ran away on a hill and he bailed out, something he had never done in a Liberator.
The truck appears to have been a medium wheelbase Ford cab 12.