blueprinting small block oil pump

Does anybody have a good write-up or how to on this? All ive been able to find is, tear down, sand sharp edges, put back together. Is this all thats needed or are there tolerances / clearances that need to be checked and modified aswell?

Thanks
I should add that if you want to port your pump body to improve flow then I would refer you to Guitar Jones excellent oiling mods thread which has some good photos to go with it.