This is true, but it is still listed as an 80's engine. I've sold auto parts up until I retired a few years ago. Can the op get parts by saying he has a 78 440? The answer is yes. Can he get parts by saying he has an 80 whatever motorhome with a 440? The answer is still yes and it will be listed as an 80 whatever 440 in that application and that is all I am trying to point out.