i am in the process of putting my block back together and i was wondering how i can tell on rings 1 and 2 there is usually a mark that says top but mine arent there anymore i know which 1 is top and middle ring but not how to tell top will this make any difference as i cant see any difference either way up also on the conrod on 1 side there is numbers and the other side is blank do these all need to face a certain way ie to front of block or does this not make any difference either any help much appreciated thanks