Madison Square Garden sports used to share time with C-SPAN, coming on at night when all the business on Capitol Hill was done with, but I think that was after 1978 as well.
I may have mistaken what I thought were ESPN or SPN, when in truth it was MSG. This makes way more sense as the only cable channels in my location in Idaho, other than the locals (Spokane), were a sports channel and HBO. I understand MSG had an agreement with HBO in the late 70's. In fact it appears HBO then was on the air for only part of the day so my thinking is MSG was to fill the other hours. I think you helped me solve this!
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