I have a LOS 1969 04A Build date Z/28 and noticed the vin number is stamped on the engine pad,not down by the oil filter.I know of another LOS 1969 04A build date with the vin number stamped on the engine pad.I read somewhere that the LOS and NOR cars changed the vin location to the bellhousing lip oil filter area.What month did this happen for the LOS cars and NOR cars? Dan