1970 up valve cover breathers, 1 nipple, 2 nipples, 3 nipples.

You were the one that had to put your "commentary" in my for sale ad.
And you don't even have any interest in purchasing the part from me, from the get go.

You want to know my past qualifications?
I my past life as a professional, wrenching, auto mechanic, i was a certified California smog technician for quite a number of years.
I have seen 2 port valve cover breathers on numerous 6 cylinder, 8 cylinder, engines, 2 bbl, 4bbl. during my career,
either Carter, or Holley equipped.

Your picture description is meaningless, without knowing where the vehicle was destined to be sold, in the USA.
There were different regulations for Federal, California, areas in the USA that were considered to be "high altitude" for emissions standards during that time period.

So until you know what the Chrysler engineers did during the early emissions years, back in the day, don't go by what some Chrysler car enthusiast goes by.