Here some info on that Pontiac Grand Prix you say at the car show.
I remember looking at one in at a local dealer in Georgia when they came out.
1986 -- In order to be more competitive in NASCAR racing, Pontiac introduced a special version of the GP called the Grand Prix 2+2. In order for this special car to be legal on the racetracks, it had to be released to the public. It included a special sloped nose, bubble rear window,large front spoiler,rear spoiler,and special paint that consisted of a silver top and a gray bottom divided by a red stripe. Richard Petty and his team helped Pontiac develop this special car. Underneath the special body though,the 2+2 was standard GP fare. Production of the 2+2 equaled just 1,118 units. Only trim changes for the rest of the line.