Just got this car last week and both the valve cover breather cap and pcv valve were missing. I bought a stock pcv valve (for a 1970 318 Belvedere) and it works but barely with these valve covers. the bottom of the valve hits the baffle.
additionally, since the breather hole extends down past the top of the cover (it has what looks like a sleeve or something down to the baffle), I can't find a breather cap/gromet that fits the hole. can someone send me a link to the correct breather cap and gromets for this type of after market valve cover?
thanks
Ron (Ignore the carb. its just sitting there for now )

 

Most of those covers only come with one hole in each cover. Someone punched a hold in the casting to add the extra holes for some reason?
Looks to me like you have 2 alternitives. 1, get a new set of covers. or 2, get the after market breathers and use the dummy plugs to fill the gap.

I think the Mopar performance catalog for small blocks will show a gromet and cap kit. I only found the part number for the "stamped" covers, you might check with your local dealer for the kit to fit the "cast" covers.
As for the dummy breathers.... Use like these and just dont cut open the bottoms of the grommet....
http://www.jegs.com/i/Moroso/710/97341/10002/-1

As for the PCV... If you need to use the hole in the valve cover that took the oil filler cap...us the Ford style 1/4 turn cap with the grommet in the top... works well for me. And it dont leak....

 

I like the "Street Avenger" good carb...But your going to need a manifold....