Still, nobody has provided any proof, other than speculation, that GM had a secret skunkwerks program with the government agencies from any ordering information or GM letterheads. They may have, but nobody has unearthed the presence of such animal. I wouldn't even be surprised if they did align themselves with agencies to help develop ways to do the things they claim to have done. Someone said something that was documented. Sorry, to me that's not proof. That's just hearsay written down. If they said something that was able to be validated, that's a different story. I get it, though. When you talk to some of the GM guys that were there, most know a few things, but few have anything to prove it. I've talked to several GM managers to know some of what they say is pure BS. Product development is a heavily guarded secret. Unless it was the brand manager who knew what everyone else was doing (mostly), most of the engineering guys lived in their little silos and generally speaking didn't know everything going on except their specialized area. It's not like they weren't busy. So it only goes to who do you really believe.
There are holes in that 87 GN #132 story, IMO. For instance, they acted like something was wrong that it didn't come with a 700R4 transmission instead of the standard-issue MW9 200-4R. They never specified which tires came on the car originally. Take a picture of the SPID. That should say a lot. Does it have a 7Z9 code for a police cluster or other codes that weren't normal production? Who knows? So they give you just enough of a piece of story without giving away anything substantial. A time slip means nothing as far as proving anything. And I've been around long enough working at government facilities to know that when the Govt. alphabet agencies get their vehicles, they number them THEIR way at the motor pool for tracking purposes. I seriously doubt they'd have them pre-numbered. Doesn't make sense. I speculate that this car was just a dealership shenanigan. Prove me wrong.
GM didn't get to be the biggest share of North American cars at the time by risking going outside the certifications for their cars. So, unless there was some sort of waiver granted for them to develop cars that defied those certifications, I have to say there was a stopping point. The entire police package that GM was willing to do for most cars was akin to the motor coach side of things. They would only build the vehicle to a certain point, and wouldn't go any further. Did they make these so-called "cop chips" available to third parties doing modifications or did they tell them how to bypass the speed limiter? Perhaps. Again, never proven. I don't think they'd want to have their name associated with it if they did. So that kind of info may live on in folklore at best.
So far, it's the same ol' same ol' that's been rehashed before. Unsubstantiated stories. Even the brown FBI TR RPO hand-written list doesn't show much that is odd other than it had a K09 RPO (120 A alternator), which would make sense for a LEO vehicle. And the T47 RPO was a steel turbo hood. Everyone acts like it was a big deal that LE agencies ordered GNs and TRs. I'd be surprised if they didn't. I still think it's cool they did it, but the stories of GM selling heavily modified cars under the radar seems like a stretch. What I didn't see was anything about a special calibration or gearsets, and other odd stuff. If it was done after the fact at a dealership or some other facility before or after delivery, so be it. And the FE2 RPO that was on there doesn't come with a fat rear sway bar and the rear LCAs turned upside-down. I think that was done after the fact. All the things I've seen are just hot rod mods that everyone would want to do, anyway.
To me it always just sounded like the old yarn of Demmer installing 455's in the 68
H/O because of the >400 cubic inch ban. Which turned out to be proven hogwash, and Doc Watson even admitting that himself. There are some people that still believe it for some strange reason.