In the mid-80s (about 1985?), WHTM actually updated to it. In '86 they were even still using the late 70s Times-Mirror stations theme (NMSA "KDFW 1979").
Even WETM used the same typeface, though we don't have any newscasts from the period when T-M still owned the station. (WSTM never seemed to, and then Elmira, Syracuse and Harrisburg were sold off in 1986.)
KTVI seemed to never be part of any standardization. If they were, it might have been in late 1980-1981 (T-M did not own KTVI until 1980). That said, it's unclear quite what they were like between 1980 and 82 or so.
In 1980, they dropped the NewsCenter 2 imaging they had been using. There's not much of that, but there's a demo reel from a graphics company with a KTVI 10pm open:
In 1979, though, they hadn't yet adopted that logo (there's a snippet in the final second showing their set):
Times-Mirror in general had more standardization than many groups in the 80s, especially early in the decade and then in the 1987-88 period. (The Yours Truly graphics package comes to mind.)