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Question ...I have an restored numbers matching RS/SS 69 conv. Car was built 3rd week in Nov (pre X code car. How can I tell if it came with a spoiler, or was the spoiler standard with the SS or Rs option? Also the interior is a custom weave and the seats have head rests. I can't find any reference anywhere of headrest being an option or standard, yet on the original bill of sale from the original owner it is listed as a $16.90 option. Any clues??? Thanks