I have a 1992 Black Rose Coupe, the only option is gray leather seats, I think this is quite rare.  I have used the extrapolation I found in the Black Book.  My question is can I use it backwards? Example, there were 20,479 Vettes built in 1992, and 19,378 had power driver seats, which means only 1,101 did not have this option.  There are other options that are not listed that would make  my Vette quite rare.  Any suggestions? 

is it possible that the 1101 cars had both seats electric? try the vin decoder under reasearch as that may tell how many were made with that option.