To me, that era was the apex of when managers used the 'bullpen ace' perfectly and to his full benefit. Previous to that, teams stockpiled bums in the bullpen, and with the exception of guys like Roy Face or Hoyt Wilhelm, when teams found somebody good they would either turn him into a mediocre starter, or waste him and burn him out by having him go 4 innings in blowouts. The late 70's saw managers use their best guy in any crucial situation in the 7th or later, and then leave him in to finish the game if it stayed close (this is how Dusty Baker was using Chapman this year, until he put him in the dreaded "closer role". He still brings in Chapman in the 8th sometimes with men on, but now half of Chapman's appearances are with 3-run leads in the 9th, instead of tie games in the 7th or 8th. Stupid.). Now, of course, the 'bullpen ace' is totally under used, but that;s a different discussion.