Without geeting in great detail. What is the difference in a 1997 454 4x4 and a 1998 454 4x4? I want to buy a service manual for my 1998 and having a hard time finding one and was thinking about buying a manual for a 1997. It appears that they call a 1997 Bearcat and a 1998 Artic Cat so Im thinking there is a dofference Thanks