There were two UP decos. One with slogan and one without. I think i looked up the date for the slogan before... it was in the 1990s i think. I would ask you guys for the actual date on that.
Im kinda doing the same project. But i want to know whick autoracks are accurate for the 1970s... im building an autorack train for my 1970s engines... so i used the UP autorack without the slogan... sorry to hear the black CN was 1985, that comes out of the train.
To venture a guess, I would say so far, the:
6-82503 Chessie System
and the upcomming 6-84908 & 6-84909 Southern and
6-84914 & 6-84915 MKT Autoracks in the 2018 catalog.
for the flats- a dead giveaway is:
- the Flat car must have the old "TT... Trailer Train" logos spelled out on the flat car
- NO Conspicuity striping
However the Lionel Autoracks may not be totally correct as the the design of the Lionel autoracks, if any, was just starting top be produced in the late 1970's. Also I think Trailer Train changed their reported flat car markings in the 1980's and the Autoracks may NOT have been designated as just ETTX and TTGX. I remember there was KTTX, CTTX, TTBX, and others. Somehow my memory states either MR or RMC had an article on TTX Flat Car markings changes.
Anyway, here are some 1980's to 1990's Autorack cars that I HOPE Lionel will decorate in the near future!
http://www.rrpicturearchives.net/rslist.aspx?id=TTGX
[NO NONE of these pics are mine.]
note ATSF red instead of freight car red for paint.