Yes, there are many instances where dealers installed spoilers, which of course would then show stripes on the rear lip of the decklid. Since this car has the 68 spoiler, which would be correct for this early build, it's a likely possibility. Or of course during the repaint, it's possible the repaint just wasn't done correctly. But the 68 spoiler tells me it's been on there a long time. Most conversions done later generally you find a 69 spoiler. Some investigative work could determine either way, when it comes time to strip and paint. I'd also be looking at the torsion rods underneath, from what I'm told spoiler cars had one rod larger than the other. That would at least answer whether it was installed on the assembly line or not, but it won't tell you if the dealer did it. I don't believe all the assembly line spoiler cars always had the D80 code on the tag when it comes to the early cars so that's a wash.