Anybody have a part # or know if I can get a vented gas cap for my 72 road runner?

Post deleted by moparzrule

Looks like 11632 stant is the vented cap.

If the counter guy will let you walk back and look at the caps there's a good chance you can match a vented one up to your old cap or measurements from the fill tube. I found a new cap for a '47 power wagon at Autozone that way.

I bought mine at the local parts place. They had two listed and he showed me both and the one that fit I bought.

The stock spec cap is vented, but has a valve that opens under certain pressure/vacuum in conjunction with the CAS (vapor separator) set-up. If your vapor separator is bypassed/missing/plugged, you may have a vapor lock problem if you go with the stock cap. In this situation, you'll want a cap with an open vent.

As mentioned, the fume police might come after you.