One of John Jackson's understudies

I had the pleasure of watching the game on Monday, well pleasure of his company not watching the game, of an ex goalkeeper called Steve Chapman. Nice bloke who lives near me in Spain, he said he had no chance at all at Palace while the great Jackson was there which makes sense. He said his hero was Vic Rouse who he stood behind as a lad and said he was the first ever 4th Division player to represent his county. Does anyone know when he was at Palace, I have a squad photo I can post but there's no year on it. Yes I know I can ask him but no idea when I will see him again and can't work out the year from the photo. I would think late 60s, Kember and Lazarus are in the squad.