carb rebuild for 79 650

I have a kz650 that I thought was a 1978, but it was manufactured in 1978 and has the air injection system, so i think it is a 79, is that right?
I also need to get some carb parts, either full rebuild kits or at least gaskets and o-rings. I looked at z1 and they had gaskets but i didnt see o-rings. Also what carbs came on a 1979, are they the same as the 1978?
thanks

Check your manual or buykawasaki.com for details on which assembly went on which model.