David after having another more careful look (which I should have done the first time) at an enlarged photo and then zooming in on the Right hand pair they have been converted to COE style configuration as the body is approx halfway up the Bonnet (hood) and the front mudguards. This does in fact make sense as there is a lot of space down the side of the motor and at the rear of the front wheels under the Mudguards.
I wonder if any of these exist today? (the Chevs not the Ford Transit)
The Ford Transit van is similar except for the design being semi COE from the start where as the Chev's were conventional body configuration and not COE.
I wonder how much influence the genuine COE design had on the body builders? Of course the COE versions if my memory is correct were a lot higher then these conventional style trucks.
cheers
Cliff