I'm in the process of rebuilding a 4d55 to put in my '91 Ram 50, we've got to installing the balance shaft bearings. One of them will fit, the other one, the one below the injection pump, is so far wollered out that there is no chance. What I want to know is if there is an oversized bearing they make to fix it, or is there a sleeve kit to repair it, or will I have to do a balance shaft delete? Anyone have any idea?