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

Well, if you really want to get into a pissing contest here, what difference does it make what vehicle i found the breather on.
The breather was used on other engines, applications, in the 70, 71 years.
My ad description states, numerous engines, and areas of the USA.

Then what are YOUR qualifications.
You ever been a licensed mechanic in your lifetime? Doing smog inspections, and repairs on vehicles?