There are no option stickers for cars older than 1984, unless you are lucky enough to find your build sheet. According to my information the trim code is 62, dark camel tan. There is a tag on your cowl/firewall area above the steering column area that has your trim code. Its metal and attached with two screws(84-87 Regals have them too.). It should have your VIN,body number(different than VIN),seat code, exterior paint, interior trim and model number. One of the codes should start with a 62 or it is the number that ends with a letter other than U,L,M,T. i.e. 60E.
Eric Fisher