This is a 2 nipple valve cover breather that is used on 1970-71 Mopar engines with the fuel vapor emissions system for California, and Federal, specification built vehicles, depending where your vehicle was originally destined to be sold.
Hemi's, 6 Pack's, Big blocks, Small blocks, Slant 6's, all could have used this breather in 70 & 71.
Old paint removed, and soaked out, with a cleaning solution called Super Clean. You paint with the color, and brand paint, of your choice.
The last 2...
Mopar 70-71 2 Nipple Valve Cover Breather.