I remember Magnum PI being on at 8:00 Thursday evenings on CBS and the Dukes of Hazzard was on the 8:00 pm slot on Fridays (after The Incredible Hulk was basically cancelled in about 1981). Believe Bret Maverick (1981-82 revival) was on at 8:00 on Thursdays on NBC.
do not forget Night Rider, Air Wolf, The A Team, Macguyver, Miami Vice, Night Court