I think they have diagrams on minneapolis moline.com and Im sure someone on here has restored a ZAS and will chime in. If someone doesnt chime in I might be able to find a picture somewhere as all I have at the moment is a picture of my ZAU. As far as I know the 1951 models on the hood should read (MM)Minneapolis-Moline (Z). That is the way it should read either side, with the Z following Minneapolis Moline. With that said the right side will have the Z towards the front and the left side will have it towards the back. I have heard that there were a few that came from the factory with the "Z" up front on both sides but the majority of them are as stated, and figured that is the way they were generally supposed to be. Those are the only decals on the hood and gas tank. Generally the decal sets cover the ZT models as well is why there are "extras" in the set. The MM on the gas tank was only used on the 1949 models. If you have the float-ride seat, which the 51's should have, there is a small MM decal on the back of the bar that extends up to hold the seat. On the back of the "bucket" seat I believe is where the "UNIVERSAL" decal goes.