same as an 69 Impala / Caprice 396/427. I just looked through my Year One - Impala catalog, don't see it. I'll see if I can find my Classic Industries catalog.
don't see it in my Classic Industries catalog either. You might be out of luck for a repro, but keep an eye on ebay. Is yours missing, or are you seeking a newer looking one?
It's missing along with the part that the hose would connect to that plugs into the valve cover grommet. I'd settle for a good used one if somebody has one.