RP14 An old timer gave me an original 54 shop manuel kinda oily you know. Those are good reading,went to roll-in a set of main bearings in my 235. Read all the books-have already done it years ago- Chilton,Motors,Chevy, all different insructions how to do it,so used my method, it's running good today roda and mains all -.002. So read the books do stuff your way !!! Hint--- learn from the old guys !!!