the bearings should be numbered,as they come in a set, they are slightly different external sizes in some locations and are not totally interchangeable and the oil holes install at 12 oclock-3 o-clock with the block in the normal position and looking from the front, to match the oil passage locations
read thru the link, posted above ,and all its sub links carefully, the thread link posted below might help also YOU'LL MISS A GREAT DEAL OF INFO, IF YOU SKIP READING LINKS AND SUB_LINKS ,SCATTERED THROUGH MOST THREADS