The reason for my original query is that the DD4-60 appears to have different features from any other Dodge such as a WW2 WC- series, a Power Wagon, or the M37.
The Power Wagon was used by the RAAF and had a 250ci flathead six cylinder engine. Note the wheels are disc wheels with split rims. The radiator surround is quite rounded in comparison to the WC series Dodges, with similarities to the T-234
Burma Dodge. I think the RAAF PW's were US sourced.