[TDW]

1968 thru 1971 = optional package: there is no way to verify an SS these years without some original paperwork. In-dash tachs, floor consoles/shifters, console gauges, bucket seats and even 12-bolt rears are NOT indications of a real SS. There were real Super Sport Novas built with the standard dash, column shifters, bench seats and 10-bolt rears. However, you can guess at it's originality. First, all 1968 Super Sports have finned front drum brakes (standard Novas have non-finned drums), and all 1969-71 Super Sports have power front disc brakes. The next thing to check is the engine code. If the engine is original (the last 6 digits of the VIN are stamped on the engine block) and it has a application code (also stamped on the block) that decodes to an SS only engine, then you have a real SS. Without the original engine or some original paperwork, you're basically out of luck.

This info is from Steves nova site.