You asked "what was the first official pursuit car"
That is exactly it.
Ok..........
I explained best I could above but I`ll give it one more try.
Take a 1987 Buick T-Type Regal. (basicly same as a Grand National)
The Pittsburgh Police recieved 10 of them when them came out. They used them as pursuit cars for 7 years. They were 2 doors, fast, and their sole purpose was to run down speeders. When sold 7 years later, if you bought one at the auction, that car is no different than the one in my garage. The police using it for 7 years means nothing.
Now, that fits exactly into what your saying about a 30s or 40s car. I agree. A hot-rod pursuit car the police used for that purpose.
But, those turbo regals are no different than any other turbo regals sold new or used.
"official" pursuit cars, or sometimes called police interceptors are ones that are built from the factory. Reguardless of options, or what was done to them, they were "labeled" from the factory when new and remain that status for life reguardless who owns them.
They have special plates and codes from the factory seperating them from their sister models.
I can take a 1992 Mustang 2 door coupe notchback and buy every single thing that went on a Special Service Package Mustang, add all the police trimmings, and it will be an identical clone. But its not a real police interceptor.
You can take a 69 GTO and make a Judge out of it, but its not a real Judge.
What I`m trying to say is, the eariler model 2 door pursuit cars you speak of police used, reguardless of what options they were ordered with, and what was done to them for law enforcment purposes, were not "official" pursuit cars built from the factory and "labeled" that status from day one.
An "official" pursuit car is brand at birth same as a "official" GTO Judge.
Being a hobby of mine, I have never come across any information indicating that their was an "official" police pursuit car built from the factory before that 1971 AMX.
If you find and info indicating otherwise, please post it. Always looking to learn more about them.