I think the last one Rod put up is for export 308's without emissions. Middle one is probably the later manifold and the top one is probably the early one. You just need to look for very original cars around your engine number to find out what they had on them. From memory A9X got the earlier style and they were built into late 1977. So some time after that. I've never looked at the manual vs auto thing either and the change may have something to do with that as well.