They probably know it's 1 of 7 Wisconsin State Patrol SSP's for 1988. Doug

Vehicle History Report
...........Said.............
was not in AZ till 02
05/16/1988 NICB Vehicle manufactured
and shipped to original dealer
(then nothing reported till)
08/30/1991 95,543 Wisconsin
Motor Vehicle Dept.
Milwaukee, WI
typical of the (Lost time) in service
then it bounced around Wi. till 02
when it came to AZ Also
it's a auto car! they ordered Auto. so if it walks like a duck!
talks like a duck. I addition has has surface rust
and a really nice dash (typical of mid west cars)
I am more then likely completely wrong about
this being a WSP Mustang. but i don't think so.

Thanks Andy. By chance are there any photos of the interior, front, or of the right fender/trunk area? WSP identity can be confirmed by what holes for equipment are present in those locations.

I wrote the guy and this was his response:

"Sorry we have changed the ad H.O 5.0 i tired of explaining it so now i don't sry it a Mustang with heavy duty suspension pack and the H.O kit thats it as is thank you call 480-510-6151"

Like this picture?
where the RED/BLUE lights were?
http://i41.tinypic.com/an24uc.jpg
the can of Cheez Whiz in the glove box...?
i have no proof that this IS/WAS a WI. State Police Car
(as i said earlier) but all the indicators say .....it is.
If the 1/4 was not bashed into the trunk and the
door sticker and Buck tags were not gone
this might be (something worth looking into)
other then a Letter from the State of Wisconsin
verifying the State Police Connection
I would have to say it's Un Known
But if it walks like a Duck....Quack Quack

Andy, What was the VIN?

PM Sent....Amigo

Just my two cents. My '87 WI SSP has an antenna mounted on each quarter panel, just ahead of the trunk. They put in rubber plugs when sold, and I don't see a hole in the crushed quarter. Mine also has another antenna mounted through the package tray behind the third brakelight. Later WI SSP's has this one on the roof. Two way radio head mounted in the dash under the factory radio. You guys probably know all this, but I was bored.

SSP
 

and don't forget that car is scary fast:yes: anyway there are 38 wisconsin ssp's I had a 93 and I sold to a guy name george in wisconsin