I went to all the Wembley finals between 1963 and 1981 and also the 1971 final in Gothenburg.
The one I remember most was the 1967 final. I had taken a group of college friends to see it. Most of them had never seen speedway before and, as I was a big fan of Ove Fundin, and as our college was in Norwich, I got them all to support the great man. As Grachan has said on another thread, he wasn't expected to win as it was felt that he was a bit past it by then and Briggo was the hot favourite. But, of course, Ove did win, making five titles altogether, the most wins at that time, and cement his place as a permanent candidate for the "greatest ever".
It was a great feeling when he did win, especially as my non-speedway friends got very excited. I don't know how many of them went on to watch speedway later on, but at least for one night they were fully absorbed in the atmosphere that only speedway can give.
Oh yes, and, as I have said elsewhere, I agree with Gem about the 1981 final.