thanks for your replies, but not quite what i was after
The car has had several engine conversions,
its a ke70 so I'm guessing it started with a 4k, then the previous owner had converted in to a 4agze at some point and now currently has a 4ac in it. On the license renewal form its say the engine number is 4A23xxxxx
so what engine is the car registered with? the 4agze or the 4ac