The belt driven pump with the big activation knob poking through the dash looks exactly like the one my 1948 3800 has. My dump box, however, is a single hoist and the box is ready made, completely, somewhere in the US I suppose. It was designed to have the stock fenders mounted on the aftermarket box. There is a manufactures tag on the outside LF corner of the all steel bed.
That's all for now and hope this helps somehow..
