1973 Dart Sport Broadcast Sheet Question

Yeah I also have an original 73 dart sport 340 car and I checked my build sheet also and I have 88 there on mine which mine has the interior decor package which was bucket seats console and had a A88 code.....So I think this is an option code for any packages that were not standard.....not sure what 64 was but Alaskan TA is probably right gold duster option