Need help with a fitting on a Holley 2 Bbl carb, please.

ProjectBazza said

Yup. I'm pretty sure this is what RRR was trying to tell me last night with his response, when my brain wasn't engaged properly.

(Hmmm: Brain synchros not functioning for me? Possibly!)

Click to expand...

Yep, that’s a bowl vent alright.
To make things look complete I would run a vacuum hose off that along the valve cover to the back of the motor and leave it at that.
Best looking simplest solution I think.