1983 experimental corvettes?

[Artic93]

I just ran into a nice older guy who says he owns one of 9 experimental 1983 corvettes. His dad who worked for GM was able to get it from a engineer there...car was never serialized for 13yrs but they gave him a notorized bill of sale. GM tried to get it back from him years later. He says it has 425 HP quarter in 9.5 and certified at 205mph bottom is all F1 suspension and wheels do not turn to far in. NCRS has seen the car as well, and I believe has given it some sort of documentation.
The car is a silver green with woodgrain on the dash. He said the rest of the cars were destroyed.

I've never heard of this car, but I thought you guys might want to hear about it.