Jack assembly, trunk spatter paint, foam pads under cowl vent grille, motor mount bracket fastener position. All VN VIN tags seem to be black. Through the end of October 1968, Norwood tags were color-coordinated. Some VN Z/28s w/o vinyl top have the shorter rear stripes. Haven't seen a VN build with sound deadener inside the rear quarters.
I'm sure there are others.