Most likely Norton ends up horizontal for a double ten count. He was completely blown away by lesser punchers let alone a lineal champion puncher.
Bruno was a tremendous Puncher, also not especially agressive and stiff enough for Norton to beat, His best weapon is a jab which norton is an expert at neutralizing and the right hand which the cross armed defense also covers
You are overestimating Norton. If we see that the best "puncher" whom Norton beat was Mohammad Ali, and that Norton lost by knockout to Foreman, Shavers, and was also knocked out by Jose Luis Garcia Then the hardest hitter whom Norton can beat is Mohammad Ali.
Bonecrusher Smith, Morrison, Zhang? He'd have a reasonable chance of beating Wilder. There's lots of unskilled guys out there who hit very hard who Norton would easily beat, someone like Mahmoudov for example.
this makes literally zero sense. For one. Norton beat people who punched harder than Ali including Quarry and Bobick.