Perhaps Grundy would know what it is but its been my experience that a lot of standard insurance companies (progressive, geico, etc) will not know anything based upon the vin. In fact I had to argue with Geico about getting comprehensive. They couldn't understand why somebody would want comprehensive on a domestic car from the 80's. I had them research the values and basically asked what I would get if the car was stolen. They needed to inspect it in person but then they told me that since it was an actual GN the value was 4 times more then if it was a Turbo T. We all know this is bs...but at least for Geico unless it is an actual GN (no clone) then don't bother. One thing progressive has though is accessory add-on policy. So they might say your T is worth 4.5k but then they'll let you add on 5k more for aftermarket turbo, gauges, stereo, intercooler, etc bringing the total value to 9.5k. Something to consider