I’m referring to under the vinyl side molding/door protector there is that cut in the body and the arrow point is right in the line, but I’ve only seen it on some newportsYou mean that vinyl body side molding or the contours of the sheet metal?
IF the body side molding, check www.hamtramck-historical.com, in the Library and Trim Selector, which should have graphics of the factory body side moldings.