I need to replace my water pump. I want to do the whole thing not just the impeller. I've been searching all over the net for this and can't find one to fit (or says it will fit) my 1989 model. It isn't like there is a lot of different kits to choose from but I just can't find one that says it fits my serial #. It's OC2147XX. Is this uncommon? Any cross refferance numbers would be greatly appreciated.