T_Highley

I am new here trying to find out some information regarding a 1976 Riviera S/R. It has 89K miles on it withh a 455. THe interior has bucket seats and the shifter is in the center console not on the column? The body is 95% rust free but is missing a few of the bumper fillers and the interior is so-so. I am wondering how rare of a car this is with everything listed above? Thanks