Checked through all the data that I have in my 1979-95 database. Granted its not all of Ford's production data, it's only what I have collected through web forums, auction sites, ebay, etc.
I have seen DSO 56 from 1979 through 1981 and 1992+.
I have seen DSO 76 from 1979 through 1991.
In the early years DSO 56 does indeed seem to be Davenport (IA) and DSO 76 does indeed seems to be Denver (CO). It the later years it does seems that DSO 56 shifted West when DSO 76 disappeared.
|