I had to do some digging to find this. It is from the 1970 Plymouth technical service bulletin
No. 70-25-8 "Maintenance schedule and parts information for the AAR Cuda". It is dated May 7, 1970.

Note the underlined sections, where "hose" and "nipple" are mentioned, both are singular, not plural.

It is the only Chrysler document I have seen that mentions the breather on an AAR. Does anyone else have a similar TSB for the T/A? If so, I would love to see it.

Barry