They technically were in 1971 as well. Their only home loss that year was at the Cotton Bowl in week 3 before they moved to Texas Stadium starting in week 6. They went 5-0 at Texas Stadium during the regular season and also won the NFC Championship Game there that year as well.
Thanks for the info. I used to know all the stats when I was a kid, but I've lost track of stats living in Denmark the past 16 out of 17 years and getting older too has something to do with it...not as important. I would have predicted a couple of more seasons, but we always lose a dumb one at home.