I'm probably much of the same period. I did see a lot of 70s wrestling when I was really young, but it wasn't multi-territory. Primarily GCW, but also got some of NWA Mid-America (Gulas), NWA Southeast (Fuller) and Continental Wrestling (Jarrett) depending on which relatives we visited. I remember tuning in on "Black Saturday" when GCW was replaced without notice by the WWF (as Vince had bought the Brisco's controlling interest to get the national time slot on TBS). We were rescued by Crockett Promotions, lol.
About a year after Black Saturday Joe Pedicino and Bonnie Blackstone hosted a huge time block of wrestling (called "Superstars of Wrestling") culled from syndicated shows around the nation. I seem to recall it was originally on from 8 pm to 3 am (starting just after WCW Saturday Main Event so as not to compete). Superstars was syndicated a year later, so its possible you may have seen it.