WHEN JACK O'SHEA WON HIS FIRST ALL-Ireland as a minor in 1975, and afterwards cheered the Kerry seniors to victory over . Dublin, he could scarcely have foreseen, even in his daydreaming, how these two teams were going to dominate a decade of Gaelic football. One or other of them has contested every final since that day and the most memorable finals of the decade were those fought out between them.