Classic issue, classic battle, and amazing art by Sal Buscema!
The only thing that bothered me in that issue was the "test of strength" that lasted an hour. It made no sense to me. It bothered me for two reasons:
1) Thor cannot amplify his strength alone, while the Hulk can. In a pure test of strength the Hulk should win (especially the Savage Hulk, since he based his entire essence around being the strongest. The thought of someone being stronger than him just made him that much more angry)! The in-continuity answer is that Banner holds the Hulk back when fighting heroes. (Lame!

)
2) *If* we are forced to assume that Thor and the Hulk are equal in strength, then Thor would beat the Hulk 100/100 times. Think about it--if you were fighting a clone of yourself, except your clone had a hammer that just happened to be one of the most powerful weapons in the universe *and* your clone had, literally, thousands of years of battle experience, training, could fly, etc. and could summon lightning at will to strike you, you would lose 100% of the time. In other words, to even *hope* to compete with your clone, you would
have to have some
considerable advantage.