Can you identify this chassis.

[lynx42 Rick Cove]

 Set up in Australia to recover logs. 

[Redherring]

The front chassis looks like heavy GMC.  The rear wheels could almost be GMC front wheels - they don't look like rears to me - not for a heavy-weight chassis.   Fronts reminiscent of thornycroft?  Is it just cut down or is is the combination of two vehicles?

[lynx42 Rick Cove]

Possibly an AEC 'Y' Type  by the curve on the dumb irons.

[nz2]

My thoughts are towards a mix of parts. like Redherring says, the rear wheels are more like a GMC  fronts. Then again these were proprietary items brought in so could be from many assemblers of American made trucks. On enlarging the image a few points become noticeable.  The rear a axle appears to have a chain drive sprocket beside the wheel, so was the chassis chain drive all along, with the adaptation of the drive taken direct for the winch and moving the winch required winch chain removal and placement to the wheel.

 A few extra photos from other angles would help in providing answers. Probably at the time of the photograph being taken, it was the men in the image were the centre of interest, the winch being an item to pose on. The availability of film and cost meant photos of the time taken tended  to be few. 

 To the right is a 44 gallon drum, so the photo is more recent (post 1930's) than the truck itself.

[Redherring]

The depth and curve on the forward chassis seems too deep for any AEC that I've seen? 

Oh, and they rebuilt that AEC from a badly beat-up and twisted wreck.  One very impressive Australian restoration.