A friend of mine is calling me asking how to reassemble his rocker gear (stock 1970 non T/A 340). I've never used stock parts before so I don't have a clue. He is trying to determine how the rocker shafts and arms are supposed to go together, in reading about them they call out "left & right" rockers. Can anyone list a correct sequence to identify and assemble them so that he can get it right the first time?