Sorry gang.That was me a long time ago who asked. Been busy and life got a bit crazy.
Believe me,it's taken a hell of alot to research these cars. I made lot's of pestering phone calls and even asking people thru various/other forums who have been in the museum (it's not open to the public) about them. This is exactly the color combo and look of what I wanted to make for my project. Which is also why it got me started doing a bit of research on it.
See my post on "86 Brass Hat" elsewhere in the forum.
This is indeed one of the 2+2 concepts that were created as "style concept exercises" and given to a few select Pontiac upper management to drive. These were known as "Brass Hat" cars of course. Very little paperwork accompany these cars. You hit it right on the head about the VIN#...totally for company use. Kinda like Fords Exec program in the 70's which included one offs, show cars, custom painted cars for execs and of course movie and special use vehicles. All were returned to GM after use.
Three were created. One black one, and two maroon and grey (that copied the burgundy Monte SS at the time).
The "whale tail" is not that of a porsche 911 or any other car for that matter, but instead Formula Firebird spoiler glassed and fitted for the GP. Rumour has it the Petty family had more input on these cars that the areocoupe.When the car first came to be, it rode on the standard 2+2 wheel. The ZQ8 wheels were added later as it was procured to the museum. Don't know who decided it though. Here's a pic of the black one at the Talladega museum way on back.
More reading here.....
http://www.hemmings.com/mus/stories/200 ... ture8.html