Crankcase ventilation.

they look like a stock valve cover. start witht he proper gromets for them..
https://www.manciniracing.com/mochvacogrse.html
use a stock pcv valve plumbed to the carb.
https://www.summitracing.com/parts/...ibZslxSKMVYoZH7KPHJ-MS1jJOgXTNEjvbM0duHc5ITQ0
as for the breather there are many ways to go.