Trunk Lettering 1966 Barracuda

Never heard of a car with no "Plymouth" lettering on the trunk or hood! Car companies were/are not in the market not to advertise their cars to anyone who wants to look, and I'm doubting whether they would leave their own name off the car, and pull a trunk lid off the line that hasn't been drilled! Never say never tho, if it ain't drilled, it ain't drilled, and we may never know why!!