IT was a more brutal game in the 70's before they began to change the rules for the 78 season.
In a lot of ways you have to look at three different eras. Pre 78, 78-late 80's; then late 80's to the early 2000's.
Rule changes kept penalizing the Defense. and then of course FA and the CAP changed everything.
Overall talent the 71 team has and will have more HOF players than any other. During that season, only the Packers were no longer a top team. The Vikings were still near their peak. arguably. Some say they peaked when Tarkenton came but I say different; by the time he came the Purple People Eaters were beginning to age and the size problem they had was becoming a real factor. The Colts were still right up there. The AFC had the Chiefs, Raiders, and of course the Dolphins had arrived.
Roger at QB, Duane Thomas, Clavin Hill, Bullet Bob, Lance Alworth, Ditka, Rayfield Wright, Niland, Nye, Neely, and some backups that were pretty good in Liscio and Gregg.
The D was truly Doomsday during the playoff and humiliated the team that would go undefeated the next year in the SB.
Look at how many top 5 all time Cowboys players the 71 team from the thread earlier in the week.