Valve cover gasket grommet question

I bought the black mopar performance valve covers for my 440. I also bought the grommet kit. One grommet has a large hole and the push in breather fits in it. The other is a smaller hole, maybe 7/16" in diameter. I assume it is for a PCV valve. What PCV valve do I get? Were all the PVC valves pretty much the same in the late 60's and early 70's? Thanks. Bill.

3671076 should work fine

Not all PCV's are the same. Neither in style or the vacuum at which they open. Any Fram or similar parts store catalog should give you the proper part

The above one fits 70-2000. It does supersede many times.
3671076 PCV VALVE Use 4694335,3514867,3577098,3520224.3420223 1970-2000