well i have my 80 (came with 305) bu up in the air and im trying to replace the lower pitman shaft seal and im wondering if the arm has to come all the way off the shaft and the whole unit comes out the bottom or the shaft come out the top, the bottom nut is off along with the one on the top, what would be the best way of going about replacing the seal? i have snap ring pliers and a new seal kit just not trying to break anything or waste time fooling around with it.