I'm not sure exactly what that carburator came off of, but it did not come on the Econoline. It came on a passenger car 144 or 170 engine. (not that it really matters)
It is a one-barrel carb made by Ford. Here is the exploded view.
http://econolineid.com/images/Ford_1bbl_carb.pdfThe replacement carb is Ford part# D0PZ 9510-E, D0PZ 9510-K, or D0PZ 9510-AA depending on the emissions systems installed.