Here are some pics of my original deck lid. Repos don't have holes for the bumpers although someone could add them. Repos don't have the hole for map light wiring. Other holes missing in repo deck lid inner structure. There are other nuances also when compared.
Notice on original cars the wiring for the trunk light has body color paint on it. Original bullet ends were taped to the inside of the trunk lid so on original paint cars there will be a witness area where the end was taped.