I saw this SSP recently listed on CL. In that ad, the seller included a picture of the build sheet (attached below). We have an 86 SSP listed in our VIN Project with the same DSO, and the page includes a better photo of the build sheet -
http://www.specialservicemustang.net...info208340.htm
The car for sale MAY be the one listed in our Project (or not), but the sheet does list ARIZONA on it. 'Not sure who used it though (DPS or ???)...