I think I can vouch a little for that Feud-Truth deal. Prior to 1980, I believe WAVY aired the twice-a-week “Feud”. When it went daily, WTAR (now WTKR) aired it at 7 or 7:30 pm, where it stayed until its cancellation. WTAR also aired TTTT80 at noon.
This seemed to be common in Upstate New York as my research found five stations (WRGB Schenectady, WSTM Syracuse, WICZ Binghamton, WUTR Utica, and WETM Elmira) that both Feud and TTTT80; in Syracuse, Binghamton, and Elmira the two aired together in access. The other markets bordering Albany might toss water on this theory.
NYC: Feud was on WNBC, TTTT80 on WABC
Boston: Feud was on WNAC, TTTT80 on WLVI
Hartford/New Haven: Feud was on WTNH, TTTT80 wasn't cleared
Burlington/Plattsburgh: Feud was on WCAX, TTTT80 wasn't cleared
Springfield, MA: Feud was on WWLP, TTTT80 wasn't cleared
Watertown, NY: WWNY, then sole station in the market, cleared neither (but WSTM was default NBC on cable)
Also, wasn't TTTT80 absent from some major markets such as LA? I know syndication was different back then but that's a pretty big market to not air in.
Wow. Is this indeed the only reason this version of Truth exists? Would explain why it came back so soon.
And here I was thinking that it was a bone to toss to the Goodson-Todman staffers still based in NYC who had very little to do since the previous version of TTTT had ended two years earlier.