Chev rag roof truck

[Wayne Henderson]

I am looking for information about a Chev truck I wish to identify.
It looks like a 40's Chev Lend Lease from the front, long wheelbase, a "1938 dash", metal frame roof that rolls back behind the bucket seats, fold down flat windscreen and a wooden rear section of the cab.

There is a wooden tray on the back but farmers with axes have altered the look some what. The sides are long gone.

It looks like a desert type vehicle but has a longer wheel base than photos I can find. Both trucks are identical in length and both have been owned from the late 1940's so what model is this?