Picked up the vehicle as-is for a simple repair project/beater. Heard good things about the police spec Impala, and it seemed cheap.
The best part of this car is its performance. No complaints from the 3.8L V6 besides the expected poor fuel economy. Suspension is firmer, and the brakes are strong. All these parts were upgraded for the 9C1 and 9C3 Impalas.
Holes were drilled for the antennas, and a few are starting to leak. You can still see the police markings on the taillights, holes are drilled all over the dashboard to mount a variety of removed equipment, and there was a random wooden board screwed into the trunk floor when I bought the car. There is a gap between the rear seat cushion and rear seat backrest to allow more space for cuffed hands, presumably. Also, the front bench seats were replaced by a now-removed center console and bucket seats. You really have to remember this car was used by the police, and at one point, all the holes and missing items were useful.
Electrical problems consistently haunt this car, especially the immobilizer. At least three times, the car has mistaken my key for I-don't-know-what and refused to start the engine. Every time, it's away from home, and has to be towed. Head gaskets gave out once, but damage was not nearly as bad as I thought, and seemed to be a wear issue. Mechanically, this car has held up higher than my prior expectations (though that's not saying much, it still is higher maintenance than my Volvo).
The interior is spacious and rather comfortable, if not depressing. The mild blue plastic that made up the entire interior (dashboard, door cards, pillar covers, liners, carpet, etc) really didn't help. The (blue) vinyl seats get ridiculously hot in any amount of sunlight. The trunk is accessible and spacious, and also thankfully not depression-blue. But you don't get to see that while driving, unfortunately. Don't get me wrong, everything is well laid out and easy to use, but the colour is just overwhelming and horrible. Too bad re-upholstery costs so much.