Dickie Guy was the keeper for Wimbledon when they played Leeds Utd in the 70s I think. There's a very grainy YouTube clip of the Leatherhead goal. Says it's from the 1974/75 season.
I was, in the south stand and had a great view of the winning goal, unfortunately. Was the scorer called ' Kelly'? Think so, just can't remember his first name, but he was a cocky so and so.