Why isn’t fuel going to the carb?

When did these come about, I grew up driving late 60's 70s cars never seen it. Now if it was on later 70's cars I may have never seen it. never owned late 70's Mopars. Anyway, did the OP figure this out? I thought he got it running
Yes. It’s running now. I got a different filter and I just have the vent line attached to nothing right now.