I have rebuilt many of these hinges and have yet to see one where the door part of the hinge was worn needing drilling oversize. The looseness is always caused by the pin locking up in the door part of the hinge and turning in the cab mount part. By installing a standard size pin and welding it to the cab mount part has fixed all of the ones I have worked on perfectly.
Most people do not realize that there is a hole in the hinge that leads to the pin for lubrication. Most of the box stores sell a bottle of light oil that has a long extendable tube connected that works well for lubing these hinges.
