I am looking at the Google News Archive for the Friday, November 9 1979 Ottawa Citizen TV Times. You are right on that one, with Hulk on at 8:00 (as I remembered) and then Dukes on at 9:00. I can remember sometime about 1981, “Dallas” got moved to the 9:00 pm spot on CBS Fridays. Link enclosed, as a further point of interest, please check out the topic for “In Search Of” also on at Friday at 8:00 pm on Channel 24 (TV Ontario, our local answer to PBS).
https://news.google.com/newspapers?id=dr4yAAAAIBAJ&sjid=6e4FAAAAIBAJ&pg=2978%2C2155111
Pretty cool time machine there. I see Rockford Files following the Dukes. I have a feeling that wasn’t the case in my market but maybe it was and I just don’t remember.