Yes - power started with Spurs, shifted to Arsenal in the 1930s, moved back to Spurs in the 1960s and has been with Arsenal from the 1970s onwards. Who knows what will come next.So in your biggest decade as you put is the 60's and you won the league twice and we had won it seven times before hand (not looking like great for a power shift from 70's)...
Spurs won the EUFA cup winners cup once and Europa League twice..Arsenal won EUFA cup winners cup once.....Nothing worth bragging about.
We have retained the FA Cup several times as well, I am not sure what you mean by in the space of 3 years, 60-61 61-62 and the next one was 66-67 gaps longer than 3 years dude...We have done the invincible season as well since...
We have achieved far more before and after your so called golden (Black and White) years and the Great North London Power Shift....I really don't see what was the big power shift still.........


