I have a 1983 olds cutlass supreme it has a decal on the firewall that says gm donated it for education purpose in 1984 a number s-772y is on the decal. this car was bought from a high trade school. parked under a carport in 1999. I got this car in oct. 2013, I have got this car running and drove it. the body is in great shape, and shows 34069.6 miles on it. how can I find out if this is a one of a kind car, the body looks to be a 442, with t tops, but it has a bench seat and the gear lever is on the column?