"rmeneses" is incorrect about calling all of these vans "UCBC" vans: http://imcdb.org/vehicles.php?make=UCBC&model=&modelMatch=2&modelInclChassis=on
While the Union City Body Company did make those bodies, the designations like Chevrolet Step Van and Grumman Step Van are correct. If anything, you can put "Union City Body Company" as additional info. Read more here: http://imcdb.org/vehicle_123337-UCBC.html